There are several possible reasons for this. The sweat glands in the anal area are located much higher up on the body, so they have a hard time being affected by surrounding temperatures. Sometimes there can be problems with nerves or blood supply to these areas. Another possibility is that you may need an exam from your doctor because of any pain in your anus, rectum, or lower intestine.
Why does my anus itch? What causes this?
Anal itching is caused by irritation which causes inflammation around the anus and rectum. It can also be caused by infection or irritation of other parts of the bowel system (colon), but it only affects about 4-6% of people who have anal itching at some point during their lives. This type of rash usually appears as small red spots and sometimes blisters, and it has been associated with Shigella infections (bacterial) and bacterial vaginosis. Other types of rashes such as eczema and psoriasis can cause similar symptoms; however eczema only occurs on one side while psoriasis tends to affect both sides equally. Psoriatic arthritis (psoriatic arthritis) has also been linked to chronic anal itching. Although not all cases coincide with infection/inflammation, there’s still more than enough evidence linking irritable bowel syndrome to certain kinds of skin conditions like: lichen sclerosus: A form Lupus