Hard to tell without seeing it. Anything from bug bite, bad shoes, trauma (did you drop something on it?). I'd say if it lasts more than a couple of days, becomes red, infected, and/or starts spreading out, or your ankle gets swollen too, go see your doctor.
NOTICE: The information provided on this site is not a substitute for professional medical advice,
diagnosis, or treatment. Never delay or disregard seeking professional medical advice from your
physician or other qualified health provider because of something you have read on Wellsphere.
If you have a medical emergency, call your doctor or 911 immediately.
Posted by dissnoidette
The top of my foot is swolen and it is very painful. What is the reason and how do I treat it?