Hi dear, it seems you have developed fissure in ano. ( a cut in anal canal due to passage of hard stool. ) apply diltigesic ointment 2% three times a day after passing stool. Take Dabur nature care isabgol 2 teaspoon in on be glass of Luke warm water after dinner daily for 15 days. Do sitz bath. feel free to ask any further quary.
Next Steps
It's better to get checked to rule out perianal abscess.
consult surgical gastroenterologist