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What Causes a Bump on the Bottom of the Foot?

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A bump on the bottom of the foot may cause a person discomfort or pain when walking. There are a variety of conditions that may cause bumps on the feet, some of which require medical treatment.

This article explores the various causes of a bump on the bottom of the foot and how a person can treat each cause.

Causes

A bump on the bottom of the foot may be caused by:

1. Uneven weight distribution
If certain bones in the foot are misaligned, it may cause uneven weight distribution.

Sometimes, the long bones behind the toes (metatarsals) become misaligned. This affects the way weight is distributed across the ball of the foot as a person walks.

Uneven weight distribution in the foot means some areas absorb more pressure than others. These may cause calluses to form on the ball of the foot.

Bumps caused by uneven weight distribution tend to occur in people with diabetes.

If a person with diabetes develops lumps or calluses on their feet, they should monitor them carefully and speak to a doctor. If left untreated, these lumps can cause ulcers.

Foot ulceration is the most common lower-extremity complication for people with diabetes.

2. Limited movement of the big toe joint

If a person’s big toe joint does not move correctly when they walk, an excessive force is applied to the bottom of their big toe.

A callus may develop under their big toe and the bone may become enlarged.

3. Plantar fibromas

Plantar fibromas are nodular masses that can form in the arch of a person’s foot.

These non-cancerous tumors form in the plantar fascia, which is the ligament in the arch of the foot.

Researchers are unsure why some people get plantar fibromas, but risk factors include tendon damage, a medication called Dilantin, and genetics.

4. Dyshidrotic eczema

Dyshidrotic eczema may cause bumps on the bottom of the foot that are itchy and filled with fluid.

Doctors do not know what causes this type of eczema, but it has been linked to allergies and stress. Dyshidrotic eczema can also cause skin that is:

  • flakey
  • cracked
  • painful to touch

5. Plantar warts

Plantar warts may form on the bottom of a person’s foot if they have human papillomavirus (HPV). These small, fleshy bumps may be tender to walk on. They usually heal without treatment.

6. Bursitis

Bursitis is an inflammation of the natural cushions between bones and soft tissue. Caused by excess friction or injury, bursitis may cause a bump on the bottom of the foot.

7. Cysts

Cysts are fluid-filled sacs that form with no accompanying symptoms. Cysts are normally benign (harmless). Cysts can develop anywhere on the body, including on the bottom of a person’s foot.

8. Synovial sarcoma

A synovial sarcoma is a type of soft-tissue sarcoma (cancer) that appears as a lump or swelling. It may affect the bottom of the foot and can also cause pain or numbness.

Sarcomas are harmful and may spread to other areas of the body if left untreated.

The American Cancer Society estimate that 13,040 Americans will receive a diagnosis of soft-tissue sarcoma in 2018.

9. Haglund’s deformity

Haglund’s deformity is a bump on the back of the foot or heel that forms under the Achilles tendon. It is often confused with Achilles tendonitis.

When the bump rubs against a person’s shoes, it may cause pain and irritation.

Diagnosis

If a person has a bump on the bottom of their foot that does not go away after a few days or is causing pain or discomfort, they should speak to their doctor.

The doctor can examine the feet and ask questions about a person’s medical history to determine the cause.

Once the doctor has diagnosed the cause, the doctor can recommend the best course of treatment.

Treatment

Treatment will be recommended based on the cause diagnosed.

Treatment for a bump on the bottom of the foot varies depending on the cause.

Treatments for each cause are explored below:

Limited movement of the big toe joint

A doctor may recommend functional foot orthosis for someone with limited movement of their big toe joint.

This treatment helps to restore normal movement in the joint. Once the joint can move properly, it relieves the pressure under the big toe, and a person can treat the callus.

Uneven weight distribution

A molded insole or orthotic can help treat bumps caused by uneven weight distribution. This helps to remove the pressure from the balls of the feet.

Plantar fibromas

Foot orthotics may relieve pressure from the arch of the foot (plantar fascia) and help reduce the size of the nodules.

It is also possible to remove the mass surgically. However, to ensure the plantar fibromas do not come back, it may be necessary to remove most of the plantar fascia.

A person may need to wear orthotics after surgery.

Dyshidrotic eczema

A doctor may prescribe corticosteroids or antihistamines for dyshidrotic eczema. Reducing stress may also help treat dyshidrotic eczema.

Plantar warts

Plantar warts do not usually need treatment. However, if they bleed, change color, or cause noticeable discomfort, a person should speak to their doctor. The doctor can determine whether they should be removed.

There are many ways to remove warts. A 2006 study notes that cryotherapy, which involves using liquid nitrogen to remove the wart, has the highest quality of clinical evidence to support its effectiveness.

Bursitis

People can treat bursitis with:

  • rest
  • anti-inflammatory medications
  • ice

If the condition does not improve, a doctor may recommend corticosteroids and physical therapy. Surgery may be needed in severe cases.

Cysts

A doctor can drain cysts using a sterile needle. For more significant cysts, surgery may be needed. Unlike blisters, it is not a good idea to try to drain a cyst at home.

Synovial sarcoma

A synovial sarcoma is malignant and always requires medical treatment. A surgeon can also remove it using surgery. A person may also need chemotherapy or radiotherapy to help recovery.

Haglund’s deformity

A person can often treat Haglund’s deformity with home remedies, such as:

  • wearing open back shoes
  • taking anti-inflammatory medications
  • icing the area to reduce inflammation

If home remedies are not effective, the following treatments are available:

  • ultrasound treatment
  • soft tissue massage
  • orthotics
  • heel pads
  • immobilizing boots

Surgery is also an option if other treatments are not effective.

Takeaway

There are several different causes of a bump on the bottom of the foot. Understanding these helps a person determine why they have one and take the best course of action.

It is always a good idea to speak to a doctor to get a proper diagnosis. A doctor can recommend an appropriate treatment and steps a person can take to prevent bumps from occurring in the future.

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Children Carry Evidence Of Toxins From Home Flooring And Furniture

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Children living in homes with all vinyl flooring or flame-retardant chemicals in the sofa have significantly higher concentrations of potentially harmful semi-volatile organic compounds (SVOCs) in their blood or urine than children from homes where these materials are not present, according to a new Duke University-led study.

The researchers presented their findings Sunday, Feb. 17 at the annual meeting of the American Association for the Advancement of Science in Washington, D.C.

They found that children living in homes where the sofa in the main living area contained flame-retardant polybrominated diphenyl ethers (PBDEs) in its foam had a six-fold higher concentration of PBDEs in their blood serum.

Exposure to PBDEs has been linked in laboratory tests to neurodevelopmental delays, obesity, endocrine and thyroid disruption, cancer and other diseases.

Children from homes that had vinyl flooring in all areas were found to have concentrations of benzyl butyl phthalate metabolite in their urine that were 15 times higher than those in children living with no vinyl flooring.

Benzyl butyl phthalate has been linked to respiratory disorders, skin irritations, multiple myeolma and reproductive disorders.

“SVOCs are widely used in electronics, furniture and building materials and can be detected in nearly all indoor environments,” said Heather Stapleton, an environmental chemist at Duke’s Nicholas School of the Environment, who led the research.

“Human exposure to them is widespread, particularly for young children who spend most of their time indoors and have greater exposure to chemicals found in household dust.”

“Nonetheless, there has been little research on the relative contribution of specific products and materials to children’s overall exposure to SVOCs,” she noted.

To address that gap, in 2014 Stapleton and colleagues from Duke, the Centers for Disease Control & Prevention, and Boston University began a three-year study of in-home exposures to SVOCs among 203 children from 190 families.

“Our primary goal was to investigate links between specific products and children’s exposures, and to determine how the exposure happened — was it through breathing, skin contact or inadvertent dust inhalation,” Stapleton said.

To that end, the team analyzed samples of indoor air, indoor dust and foam collected from furniture in each of the children’s homes, along with a handwipe sample, urine and blood from each child.

“We quantified 44 biomarkers of exposure to phthalates, organophosphate esters, brominated flame retardants, parabens, phenols, antibacterial agents and perfluoroalkyl and polyfluoroalkyl substances (PFAS),” Stapleton said.

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Your Home Is A Hidden Source Of Air Pollution

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Cooking, cleaning and other routine household activities generate significant levels of volatile and particulate chemicals inside the average home, leading to indoor air quality levels on par with a polluted major city, University of Colorado Boulder researchers have found.

What’s more, airborne chemicals that originate inside a house don’t stay there: Volatile organic compounds (VOCs) from products such as shampoo, perfume and cleaning solutions eventually escape outside and contribute to ozone and fine particle formation, making up an even greater source of global atmospheric air pollution than cars and trucks do.

The previously underexplored relationship between households and air quality drew focus today at the 2019 AAAS Annual Meeting in Washington, D.C., where researchers from CU Boulder’s Cooperative Institute for Research in Environmental Sciences (CIRES) and the university’s Department of Mechanical Engineering presented their recent findings during a panel discussion.

“Homes have never been considered an important source of outdoor air pollution and the moment is right to start exploring that,” said Marina Vance, an assistant professor of mechanical engineering at CU Boulder.

“We wanted to know: How do basic activities like cooking and cleaning change the chemistry of a house?”

In 2018, Vance co-led the collaborative HOMEChem field campaign, which used advanced sensors and cameras to monitor the indoor air quality of a 1,200-square-foot manufactured home on the University of Texas Austin campus. Over the course of a month, Vance and her colleagues conducted a variety of daily household activities, including cooking a full Thanksgiving dinner in the middle of the Texas summer.

While the HOMEChem experiment’s results are still pending, Vance said that it’s apparent that homes need to be well ventilated while cooking and cleaning, because even basic tasks like boiling water over a stovetop flame can contribute to high levels of gaseous air pollutants and suspended particulates, with negative health impacts.

To her team’s surprise, the measured indoor concentrations were high enough that that their sensitive instruments needed to be recalibrated almost immediately.

“Even the simple act of making toast raised particle levels far higher than expected,” Vance said.

“We had to go adjust many of the instruments.”

Indoor and outdoor experts are collaborating to paint a more complete picture of air quality, said Joost de Gouw, a CIRES Visiting Professor. Last year, de Gouw and his colleagues published results in the journal Science showing that regulations on automobiles had pushed transportation-derived emissions down in recent decades while the relative importance of household chemical pollutants had only gone up.

“Many traditional sources like fossil fuel-burning vehicles have become much cleaner than they used to be,” said de Gouw.

“Ozone and fine particulates are monitored by the EPA, but data for airborne toxins like formaldehyde and benzene and compounds like alcohols and ketones that originate from the home are very sparse.”

While de Gouw says that it is too early on in the research to make recommendations on policy or consumer behavior, he said that it’s encouraging that the scientific community is now thinking about the “esosphere,” derived from the Greek word ‘eso,’ which translates to ‘inner.’

“There was originally skepticism about whether or not these products actually contributed to air pollution in a meaningful way, but no longer,” de Gouw said.

“Moving forward, we need to re-focus research efforts on these sources and give them the same attention we have given to fossil fuels. The picture that we have in our heads about the atmosphere should now include a house.”

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Diet Drinks May Be Associated With Strokes Among Post-Menopausal Women

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Among post-menopausal women, drinking multiple diet drinks daily was associated with an increase in the risk of having a stroke caused by a blocked artery, especially small arteries, according to research published in Stroke, a journal of the American Heart Association.

This is one of the first studies to look at the association between drinking artificially sweetened beverages and the risk of specific types of stroke in a large, racially diverse group of post-menopausal women. While this study identifies an association between diet drinks and stroke, it does not prove cause and effect because it was an observational study based on self-reported information about diet drink consumption.

Compared with women who consumed diet drinks less than once a week or not at all, women who consumed two or more artificially sweetened beverages per day were:

  • 23 percent more likely to have a stroke;
  • 31 percent more likely to have a clot-caused (ischemic) stroke;
  • 29 percent more likely to develop heart disease (fatal or non-fatal heart attack); and
  • 16 percent more likely to die from any cause.

Researchers found risks were higher for certain women. Heavy intake of diet drinks, defined as two or more times daily, more than doubled stroke risk in:

  • women without previous heart disease or diabetes, who were 2.44 times as likely to have a common type of stroke caused by blockage of one of the very small arteries within the brain;
  • obese women without previous heart disease or diabetes, who were 2.03 times as likely to have a clot-caused stroke; and
  • African-American women without previous heart disease or diabetes, who were 3.93 times as likely to have a clot-caused stroke.

“Many well-meaning people, especially those who are overweight or obese, drink low-calorie sweetened drinks to cut calories in their diet. Our research and other observational studies have shown that artificially sweetened beverages may not be harmless and high consumption is associated with a higher risk of stroke and heart disease,” said Yasmin Mossavar-Rahmani, Ph.D., lead author of the study and associate professor of clinical epidemiology and population health at the Albert Einstein College of Medicine in the Bronx, New York.

Researchers analyzed data on 81,714 postmenopausal women (age 50-79 years at the start) participating in the Women’s Health Initiative study that tracked health outcomes for an average of 11.9 years after they enrolled between 1993 and 1998. At their three-year evaluation, the women reported how often in the previous three months they had consumed diet drinks such as low calorie, artificially sweetened colas, sodas and fruit drinks. The data collected did not include information about the specific artificial sweetener the drinks contained.

The results were obtained after adjusting for various stroke risk factors such as age, high blood pressure, and smoking. These results in postmenopausal women may not be generalizable to men or younger women. The study is also limited by having only the women’s self-report of diet drink intake.

“We don’t know specifically what types of artificially sweetened beverages they were consuming, so we don’t know which artificial sweeteners may be harmful and which may be harmless,” Mossavar-Rahmani said.

The American Heart Association recently published a science advisory that found there was inadequate scientific research to conclude that low-calorie sweetened beverages do – or do not – alter risk factors for heart disease and stroke in young children, teens or adults. The Association recognizes diet drinks may help replace high calorie, sugary beverages, but recommends water (plain, carbonated and unsweetened flavored) as the best choice for a no calorie drink.

“Unfortunately, current research simply does not provide enough evidence to distinguish between the effects of different low-calorie sweeteners on heart and brain health. This study adds to the evidence that limiting use of diet beverages is the most prudent thing to do for your health,” said Rachel K. Johnson, Ph.D., R.D., professor of nutrition emeritus, University of Vermont and the chair of the writing group for the American Heart Association’s science advisory, Low-Calorie Sweetened Beverages and Cardiometabolic Health.

“The American Heart Association suggests water as the best choice for a no-calorie beverage. However, for some adults, diet drinks with low calorie sweeteners may be helpful as they transition to adopting water as their primary drink. Since long-term clinical trial data are not available on the effects of low-calorie sweetened drinks and cardiovascular health, given their lack of nutritional value, it may be prudent to limit their prolonged use” said Johnson.

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