Hello dear
Understand your concern.
Yes it may be due to
injury to anus by scratching.
It also associated with other factors like:
Excessive moisture, sweat, pressor on sitting, rubbing and scrathing
Frequent
loose stool aggravate itching
More in diabetes
Yeast infection
Food: excessive chocolate,spicy food
Worm infection of intestine
You take following advice
1. Maintain hygiene after defecation, first wipe with simple plain tissue paper and wash properly with gentle warm water
2. Do not keep wet, dry the anal part with pure cotton towel
3. Change the inner wear after exercise and work out
4. Wear pure cotton loose inner wear
5. Eat healthy diet with lots of fiber
6. void constant sitting to minimize pressor.
7. If not resolves
You can apply
steroid ointment: 1 % hydrocortisone
Or apply
clotrimazole ointment
Or consult to doctor and do test for all above causes.
Hope this may help you
Best regards
Dr. Sagar