What Causes Bumps on the Heel
New bumps appearing where all was smooth before can be a disconcerting experience. You want to know why they are there and if you should be worried about something malignant. The good news is that many odd lumps are technically harmless. Still, when you notice bumps and lumps on your Achilles, it’s worth having them examined to determine exactly what they are.
Small, soft-ish bumps and lumps on the Achilles tendon itself are often what are called “xanthomas.” These are fatty deposits that build up on the tendon, creating small masses on the soft tissue. In many cases, these develop because your body has a hard time processing certain fats. This could be an isolated health issue, or something connected to preexisting diseases like diabetes, hypothyroidism, or nephrotic syndrome.
Xanthomas aren’t usually painful on their own, but they do look odd and might be uncomfortable if they are consistently pressed on by footwear or tight socks. Usually you get them in both Achilles tendons at a time.