An anal fissure usually heals within 2?4 weeks if properly cared for, but since you?ve had it for two weeks with ongoing pain, you should actively treat it. Take a high-fiber diet (fruits, vegetables), drink plenty of water, avoid constipation and straining, and do warm sitz baths 2?3 times daily; you can also use a stool softener and a prescribed ointment (like lignocaine or nitroglycerin) for pain relief. Avoid spicy foods, prolonged sitting, and hard stools. If it doesn?t improve in another 1?2 weeks or pain is severe, consult a doctor for further treatment.