BK, it cannot hurt to ask a chemist. A thought that comes to mind is your intestines are stretched from the pushing. It is FREE to seek a chemist/pharmacist. It is free to ask them. They may have something over the counter. (without a prescription)
I itch here as well. I do have chronic Diarrhea(Chromes Disease)Certain foods will make it worse. You might seek a cream. Just ensure it contains no scent or alcohol that will burn/sting. If I knew more symptoms I might be able to help. A chemist has an OATH the same as do doctors. If you have rectal bleeding it may be from the scratching. A cream may help. Seek a lotion that contains no alcohol.
Chemists, like All medical Staff are bound by oath.