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

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 appear on the side of feet and is a small patch of thick, dead skin which has a central core. It can be a cause hard bump on side of foot.

A tender corn that forms at weight-bearing areas of the 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 the 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 lead 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 becomes soft use the 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 the body including the lower part of the foot and it can be the cause of small bumps on the bottom of feet.

As they grow on the 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 kinds of warts fade away on its own but if they fail to go away then some active treatment is recommended.

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

You might need to repeat this procedure 2 to 3 times depending on the size of a wart.

An 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 include freezing wart with nitrogen oxide, removing it with surgery or laser etc.

Modern medicine has 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 Athlete’s foot and as the 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.

Athelet’s foot is one of the common cause for the itchy bumps on bottom of feet.

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 the bump on foot.

Blisters are small, fluid packed sacks that look like a bubble on the surface of skin.

It is caused by ill-fitting shoes that rub against skin and causes blisters. Sometimes it may get the 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 a small piece of wood, glass or tiny part of metal. It can be anything. Body usually unable to expel it out and build the wall around it to protect surrounding tissues.

Usually, people steps on a sharp object and these object break 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.


Porokeratosis is a dermatological condition, where the patient suffers from the group of different skin problems.

Porokeratosis on foot and palm usually characterised by the small seed-like hyperkeratotic lesions. These lesions come in the group and have raised margins that looks like a ridge.

They grow on the weight bearing part of the foot, so commonly found in the heel area and sometimes can also be found of an arch of the foot.

Some patients feel pain while some don’t. So the discomfort caused by the porokeratosis vary from person to person.

References +

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

Dr. Sachin

Click Here to Leave a Comment Below 13 comments
Anjanette Johnson - May 31, 2017

I have a knot on the bottom of my right foot.It’s on the arch.Sometimes it hurts so bad that I can’t walk on my feet. I would have to wear loose fitting shoes. I don’t know what it is,but it’s very painful.please help! What must it be.

    Dr. Sachin - June 1, 2017

    You need to see a doctor to diagnose it properly, as knot can be caused by many things. We almost covered the major causes that lead to knot formation at bottom of foot.

Norine - August 2, 2017

I have a very painful, small lump under the skin on the plantar… almost directly below the point between the big toe and the next. They’re so painful at times that it hurts to walk.I never wear shoes in the house and my shoe(s) of choice are Birkenstocks, Converse, and Bear Paws, depending on the season. It’s strange that this is happening now, as I’m well into year 62 without ever having foot problems.
What do you think they are and how would I get rid of them? I just bought Yoga Gems and am using them four/five times a day.
Thank you!

    Dr. Sachin - August 6, 2017

    It’s hard to diagnose without examining that bump physically. It might be a corn, callus, wart or anything else. See a podiatrist for better diagnosis and treatment.

Marylou Octaviano - August 13, 2017

Hello! With in the past month I’ve been developing pain on the different parts of the SOLE in my feet. I can feel a very small knot (about 1/8 inch) deep inside the muscle. It does need a very deep massaging in order to feel this knot though and sure is very painful. It’s not superficial and can’t be seen but through deep massaging you i am able to distinguish and feel it. It seems that I’ve been having it at least every 1 wk. Now I have total of 4 areas in my feet [ ball part of the sole of the right foot, right side of the right sole, left sole x2. What could these be?

Melissa J Abernathy - August 14, 2017

I have just started noticing pain in my right foot in the A.M. ‘mostly’ then a few days later(this A.M.) I wake up with a blister on my left and moderate swelling. It’s painful however I can walk it just is VERY uncomfortable. The pain is mostly on the sides… Sometimes affecting more but only on the bottom. The ankle on the right was broke 19yrs ago and looks like a bump (not like the bottom) this is more taller yet smaller around. Only flares up when I’m standing up longer then usual or if I step down wrong. I don’t think it has a connection yet I wanted to make sure it was known. Thanks in advance.

Ashley - August 29, 2017

I have these large masses on the bottom of each of my feet. They are about the size of a small vending machine bouncy ball and they are very painfull. They are located right where the heels of my feet are starting. I was just wondering if you had any ideas what it may be. Please respond if you have any possibilities on what it could be. Thank you.

Laura S - October 24, 2017

I am 51-on the bottom of my right foot, right under the 5th metatarsal, on the arch itself, I have 2 hard spots, they do look like calluses but, the 5th metatarsal bone itself hurts to the touch, has for years. What could have caused this?

    Dr. Sachin - November 11, 2017

    Have your doc investigated it to rule out different causes? It may be callous or bone spur.

Mary - December 9, 2017

I have hard knot , about the size of a large golf ball, on the bottom of my foot. It is located on the right foot, bottom, toward the right, and goes to the middle of my foot. Sometimes it causes pain in the arch. Very painful and get worse as I am on my feet. I have insoles specially made for me by my foot doctor. But it does no good. I have had injections but the last one I had my foot blew up. What else can help me! I am a 73 year old woman, in good health. I use to walk 3 miles a day but can no longer do that. Help

    Dr. Sachin - December 11, 2017

    It seems like you already took an advice from your doctor, apart from insoles what else he recommended? Did he diagnose the cause of knot? Unless and until the cause is diagnosed it will be difficult to treat it. It can be a plantar fiblroma or something else.

Matilda - December 20, 2017

I have a pinkish spot on the souls of my feet near my pinkie toe it just appeared over night it really hurts.

Preetha - December 26, 2017

Hi my daughter has a small light coloured rough hard bump under little toe on both feet.they are painless and sensitive to touch.just want to know about it


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