hello there, Severe pain in motion place(anus) can be due to 1) Hemorrhoids-Burning kind of pain with throbbing that seems to go on throughout the day. 2) Fissure- Severe pain with or without bleeding that aggravates after passing stool. remedy- Change in diet. Include plenty of fluids and fruits like banana and papaya in diet. This softens the stool and helps you pass motions without straining. Sitz baths- Dissolve handful of salt in a small bucket of lukewarm water and sit in it with your anus immersed in water. this will help it heal Application of hemorrhoid cream on motion place 2-3 times a day and washing your hands after that. Hope this helps Thank you for your query.