1 doctor weighed in:

Have had large lump under skin below top of bum crack. Never painful until I started pushing on it. Really painful now. No blood or pus just a lump!!

1 doctor weighed in
Dr. Susan Rhoads
Family Medicine

In brief: Get checked.

You may have had a sebaceous or pilonidal cyst.
When you manipulated it, it may trigger an infection. Please see a doc to decide whether you need antibiotics or drainage of the cyst. If you have fever, marked increase in pain, or it rapidly increases in size, redness, or warmth, go to an ER or UC right away.

In brief: Get checked.

You may have had a sebaceous or pilonidal cyst.
When you manipulated it, it may trigger an infection. Please see a doc to decide whether you need antibiotics or drainage of the cyst. If you have fever, marked increase in pain, or it rapidly increases in size, redness, or warmth, go to an ER or UC right away.
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