Need more detail: It would be helpful to know things such as duration, other symptoms, changes day to day, etc. It is possible to have lumps and bumps under the skin and many may be benign - but without more detail it would be hard to guess what is causing the problem.
Answered 12/9/2013
5.7k views
Cyst: Common location for a cyst. If painful, or growing, consult a hand surgeon.
Answered 9/28/2016
5.7k views
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