Is the internal inspection done by inserting the entire hand inside?

Patient's question:

Our unit had a physical examination. I heard from colleagues who had been checked before that in the gynecological examination, there is one item called internal examination, where the doctor needs to put their entire hand into a woman's lower body to perform the check. Just thinking about it makes me scared, and I'm sure it would be extremely painful. I also don't know what they are checking for, and why there would be such a painful examination.
Help needed: Is the internal examination where the entire hand goes inside?

Doctor's answer:

Internal examination is one of the routine methods in gynecology. It can utilize speculums to conduct relevant examinations of the vagina, or perform internal vaginal exams and three-point exams, among others, without significant discomfort.

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