Knotty lump & Bump On Bottom of Foot – What Are They?

Lumps & bump on the bottom of foot can be a result of many underlying disorders like plantar fibromatosis.

Usually patient refer these bumps as nodules, cyst, knot, swelling and lumps.

Whatever you name it, it is a swelling or a growth visible on bottom of foot which is resulted by an underlying pathological process within bottom of foot.

Trauma, infection, hampered distribution of weight-bearing force on foot can lead to inflammation which creates lumps on foot.

These bumps can be itchy, painful or painless, which depends upon their cause of origin.

Common causes

Causes can be identified by locating the area of nodules on bottom of foot.

  • Plantar fibromas
  • Corn & Callous
  • Plantar warts

  • Athelet’s foot
  • Foot blisters

  • Inclusion cysts
  • Porokeratoses

Plantar fibromas

Plantar Fibromatosis Or Morbus Ledderhose

Via – Wikimedia|Auth-Herecomesdoc

Also known as plantar fibromatosis or ledderhose disease.

It causes formation of small nodule within plantar fascia and usually it appear on middle part of arch of foot and affect one foot in most of the cases. While it is found that approximately 25% cases have both foot affected.

These nodules are usually benign in type but always require treatment to get relief, because it does not fade away by its own.

After clinical examination and proper imaging tests doctor will able confirm this diagnosis.

Once the diagnosis is confirmed, treatment part involves minimizing pressure on foot by rest & using foot orthotics, steroid injections and surgery.

Check out – Causes, Symptoms & Treatment of Plantar Fibromatosis 

Corn & Callous

Corn and calluses are the protective mechanism of our body to minimize destruction caused by friction over bottom of foot.

Corn and calluses are two different things and should not be confused with one another.

Corns usually appears on side part of feet and is a small patch of thick, dead skin which have central core.

A tender corn that form at weight bearing areas of foot is known as seed corn. Plugged ducts of sweat gland can be a cause of seed corns.

Calluses that occur at plantar region commonly known as plantar calluses.

It is mainly caused by repetitive friction on skin, which may be triggered by high heeled shoes, ill-fitting shoes, abnormal walking motion,  standing on feet for long hours etc.

Corn & calluses can be avoided by using well fitting shoes and avoiding things that leads to friction with foot skin.

Use Mole Skin Pads minimize friction and can help to prevent corns, calluses and blisters.

Soaking foot in warm water for few minutes may help to soften the hard skin. Once it become soft use a best callus remover to get rid of hard skin from corns & calluses.

Plantar warts

Plantar Warts At Side Of Foot

Warts can grow on any part of body including lower part of foot.

As they grow on plantar area, commonly known as plantar warts. It is usually caused by HPV i.e. human papilloma virus.

Most of the time these warts are not painful but as they grow, walking and standing on foot becomes difficult.

Multiple warts may grow together forming a cluster and this condition is called as mosaic warts.

Usually these kind of warts fade away by its own but if they fail to go away then some active treatment is recommended.

Using duct tape is one of the useful remedy for removing plantar warts. Apply it on wart and keep it there for approximately 5 to 6 days then remove the tape and soak foot in warm water & remove soft part.

You might need to repeat this procedure 2 to 3 times depend on size of wart.

Over-the-counter Salicyclic acid based ointment can provide results in some cases while in some cases it fails to deliver results.

Other treatment options includes freezing wart with nitrogen oxide, removing it with surgery or laser etc.

Modern medicine have very few useful options to cure warts while Homoeopathic system of medicine has shown some promising results in warts & other skin disorders.

Athelet’s Foot

Tinea Pedis - Athelet's Foot

Fungal infection between toes is known as Athelet’s foot and as name suggest it is more common in athelet’s.

Fungal infection is mostly triggered by sweaty feet and tight fitting shoes. It is commonly known as tinea pedis.

It shows typical symptoms of fungal infection like itching, blisters between toes & scaly skin.

Infection of fungus can spread person-to-person by sharing same towels or clothing.

Treatment involves using dry and clean socks, applying anti-fungal ointment and pills and paying attention to personal hygiene.

Foot Blisters

This is another reason that creates bump on foot.

Blisters are small, fluid packed sacks that looks like bubble on surface of skin.

It is caused by ill fitting shoes that rub against skin and causes blisters. Sometime it may get secondary infection.

It is advisable not to pop these blisters as they may get infected.  Instead opt for well fitting shoes and cover the blisters with tape.

Check out slide share that will help you to prevent foot blisters in future –

Via – Slideshare | Rebecca Rushton

Inclusion Cyst


A cyst that includes foreign body is known as inclusion cyst.

These foreign bodies can be be small piece of wood, glass or tiny part of metal. It can be anything. Body usually unable to expel it out and build wall around it to protect surrounding tissues.

Usually people steps on sharp object and these object breaks off in small pieces within foot tissues and get trapped inside foot tissues.

Surgical removal is the most recommended line of treatment for such cyst.

References +

Understanding Corn & Calluses – By Lisa Bernstein, MD on March 19, 2015

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