When i was wiping my bottom as i was cleaning the butthole i pressed a little bit and got a sharp pain under my shoulder when i stopped pressing the pain stopped, why is this?

There is no connection between these 2 events. I would not worry about it. Transient sharp pains occur in the body off and on....usually these have no implications.

Your arm is connected to your shoulder and exerting your hand could transmit the stress to your shoulder. There is no connection between your butthole and shoulder. For healthy diet: http://www.choosemyplate.gov/., exercise 30 minutes/day, drink enough water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. Get HPV and Covid vaccines.