Most anal fissures heal within 4 to 6 weeks.
The pain during a bowel movement should go away within a couple days though after you begin home treatment.
Soaking in a tub of warm water also known as Sitz baths can also help to heal and treat a fissure.
Some cases of anal fissures may require medical treatment from a doctor but most times anal fissures can be treated at home and can go away without medical treatment.