Our expert says:
You have to see a doctor - this is not normal. It can be:
Proctalgia fugax - a severe, episodic rectal pain that usually occurs at night. The pain may last from a few seconds to 30 minutes. The exact cause of proctalgia fugax isn't known,but could be due to a spasm in the muscles around the rectum.
Infection - abcesses etc
Nerve pain from the sacral nerves
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