Your anus has transiently formed a nozzle that produces the shape, likely due to past injury by an anal fissure and or intermittent localized swelling from irritation. I wouldn't loose any sleep over this. If it bothers you schedule a routine visit with your doc and discuss it with them.
Answered 4/2/2022
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A doctor has provided 1 answer
A doctor has provided 1 answer
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