Lump on skin: Hard to know exactly without seeing it, but possibly it's an ingrown hair, or a lipoma (small collection of fat). You cannot see a blood clot on the surface of the skin, so don't worry about that. If it doesn't hurt, and it's not red or inflamed, you can keep an eye on it. If it gets worse or becomes painful, have it checked out.
Answered 3/23/2016
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