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Lump Growing In Your Foot? A Central Indiana Foot Doctor Explains What It May Be and What You Can Do.

Comments (5)

The sudden appearance of a mass or lump in the body can be fear inducing, no matter where it appears.  Concerns for cancer or an unusual injury run rampant, and the appearance of a new lump in the foot is no different.  While the new mass is certainly not a sign that is normal, most people can rest assured that cancer is unlikely, and fairly uncommon.

A lump or mass under the skin is a sign that tissue of some form has expanded beyond its typical size.  Some causes of  a mass may be fast growing, and some may be slow growing that is simply not noticed until the area is either visible externally or is painful and prompts a personal exam.  In the foot, the most common cause of a quickly appearing mass is a ganglion cyst.  This generally benign fluid-filled mass is what most people have when they see a new lump in their foot or ankle.  An in-depth explanation of ganglion cysts and ganglion cyst explanation and treatment can be found by following the highlighted link.  Cancer within a cyst like this is possible, but incredibly rare.  Other common masses in the foot and ankle that can seem like they suddenly appear include fat tissue masses, masses of fibrous tissue called fibromas, tendon thickening from underlying bone spurs (especially behind the heel)  as well as simple cases of soft tissue swelling/fluid retention (such as often seen in front of the outer ankle).  These masses are rarely ever cancerous, and while they can cause pain do not require urgent surgical intervention.


On the other hand, serious cancer can form in the foot, and less commonly may be a metastatic mass from a cancer elsewhere in the body.  These cancers can include rare tumors of skeletal muscle, bone, fat tissue, nerve tissue, blood vessels, and cells that form the tissue in and around tendon.  Some of these rare cancers are potentially fatal, and others create serious but not lethal problems for the health of the foot or ankle.  Treatment for these cancers may need to involve the entire body, and surgery or amputation may be needed in the most serious of cases.  Once again, though, these cancers are RARE.


If you notice a mass develop in your foot, the most sensible decision is to start with a foot and ankle specialist who deals with foot anatomy on a daily basis.  A thorough exam by a podiatrist can lead to an accurate early diagnosis of the condition.  If the mass is suspicious, proper testing can be arraigned, as well as coordination of appropriate treatment.  However, over 99% of the time this is not necessary, and the benign lump can be easily treated in the office.

If you’re not satisfied,or want more information with what your GP says, you can always make an appointment with any of our doctors, Podiatrist only study from the ankle down, that is there “expertise”, and there is no way for us to make a diagnosis without seeing the lump. Thanks
Posted by Dr. Kilberg on March 16, 2017 at 09:32 AM
On my left foot it feels kinda like a bone was sticking out of my foot, but now I am scared it is a tumor (Ps will be going to gp)
Posted by Nufink on March 12, 2017 at 10:42 AM
If it is compressible it is possible that the lump could be a cyst. That being said, many soft tissue tumors and nodules with benign and not so benign origins can feel compressible, and can move into deeper tissue when pressed on if not firmly attached to a strong structure. Having a foot specialist examine the mass is the best place to start- while it could be something simple to treat like a cyst, when dealing with masses one should be cautious and have a formal assessment.
Posted by Dr. Kilberg on March 7, 2017 at 09:19 AM
You spelled arranged wrong, lol. Anyway, my question is, I had a lump appear on the bottom of my foot on the ball of my foot just left of the center, just above where the arch transitions to the ball could that be a cyst as well? It only hurts when I walk on it. If I push on it from the left side of it, it feels like fluid and it will disappear while I'm pushing on it so it feels like fluid
Posted by Terri House on March 4, 2017 at 01:23 AM
I have a hard lump on my right foot it hurts when I apply pressure on my foot can you please tell me what it is please
Posted by Clare drury on November 22, 2016 at 04:30 PM

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