Why does a gynecological examination require entering the rectum

I have abdominal pain during my period, but when I went to the hospital for a checkup, the doctor used his hands to dig into my anus, which made me feel very uncomfortable. Why did he do that?

Married women will undergo a vaginal examination during a gynecological examination, while women with no sexual history will undergo a rectal examination, also known as anal examination. The rectal examination itself is not painful, but the feeling of anal sphincter incontinence is a little uncomfortable.