It looks like fissure.
You may have a history of straining during defecation/constipation/hard stool.
Itching, swelling explain this.
Next Steps
Sitz bath regularly thrice.
Use laxatives.
Fibre rich diet , and plenty of fluids.
Use diltiazem ointment in anal region
Health Tips
Avoid mutton, spicy diet.
Can get examined by a general surgeon or proctologist.