Hi, welcome. So, you can get inflammation there that forms like a bump. Your work out may have resulted in this. I'd try ibuprofen as an NSAID or if you have another you use to see if you can reduce the immflamation. If you can't, see your doctor and they may prescribe something stronger. If that doesn't solve it, they'll test you to see if it is tumor like lesion which is benign called a neoplasma. But I'd guess it is the immflamation causing it and not that. Let me know what happens!