I understand your concern.
Well as you describe,you feel a lump in anus that you noticed during wiping after a bowel movement and went away back suggests internal hemorrhoid,Anal skin tag.
Hemorrhoids are swollen, inflamed veins around the anus.
Anal skin tags don't cause symptoms until it get irritated with hard stools, tight fitted clothes.A skin tag is normally flesh colored. Most patients will notice such lump when they wipe themselves.
Firstly you should do some physical exercises.
Eat fibre rich diet.
Avoid spicy food, caffeine.
Keep yourself hydrated with plenty of fluids.
Avoid straining during defecation.
Use a sitz bath with warm water.
Avoid long periods of sitting.
Use moist towelettes or wet toilet paper.
Try prep H ointment to relieve itching.
The only way to determine what this is the have your doctor examine you for further evaluation and management.
I hope this helps.
Let me know if you have any further query so we can discuss it thoroughly in every aspect.
Waiting for your response.
It’s my pleasure to continue this conversation until you satisfy.