What’s that bump on the top of your foot? It could be a bone spur. It could be a blister. It could even be gout, a wart, or a corn. It could also be what’s known as a ganglion cyst. Like a bone spur and a blister, this is a visible condition that commonly affects the top of the foot, as well as the ankle and heel. They can also occur in other areas.
In this article, you’ll learn more about ganglion cysts, how to spot them, treatment methods, and the severity of this foot condition. Additionally, we’ll outline some distinctive features so it’s easier to differentiate between a ganglion cyst and other common foot conditions.
But first, let’s start with the first burning question: what is it?
Ganglion cysts are noncancerous lumps – or nodules – that commonly develop along the tendons or joints of your wrists or hands. Specifically, these are the most common spots:
As foot specialists, we’re going to focus on ganglion cysts on the foot – namely the top of the foot and along the ankle.
In terms of what this condition looks like, ganglion cysts are often round or oval in shape. They’re filled with a jelly-like fluid. They’re quite small – roughly the size of a pea – but can grow to roughly 2.5 cm in diameter. They can be soft or firm, can change in size, and are painless.
Unlike some foot conditions, like osteoarthritis or tendonitis, ganglion cysts are visible to the eye. It looks like a small skin-coloured water balloon or even a water droplet on the surface of the skin. This distinction makes it immediately easier to recognize. Specifically, common symptoms include:
Notably, there isn’t necessarily a colour change. Discolouration for instance would be more common for a plantar wart or a corn, two other foot conditions visible to the eye. Instead, a ganglion cyst looks like an extension of your skin.
There is no one known root causes for a ganglion cyst. Common theories include trauma to the area that causes small micro-cysts that then contribute to one larger cyst. Another theory is that there may be a flaw in the joint capsule. This in turn allows the joint tissue to bulge out further than intended. Flaws could be caused by osteoarthritis, or trauma to the area (i.e.: a fracture, cut, etc.).
Your sex and age can influence the chance of developing a cyst. Although it can occur in anyone, women between the age of 20 and 40 are most at risk, according to the Mayo Clinic.
In and of itself, a ganglion cyst does not pose any health concern. However, if the cyst presses on a nearby nerve, you may begin to experience mild to moderate pain. In these cases, the severity of the condition depends on the byproduct of pain.
As cysts are often painless, no further treatment is required. However, your doctor may recommend taking further action if they see fit. This can be as a precaution or a measure to reduce pain. Specifically, treatments include:
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