Most anal fissures are classified into 2 main types. Acute and Chronic.
For acute fissures, topical treatment is highly effective and is usually prescribed by primary healthcare physicians. Chronic anal fissures on the other hand, are more amenable to surgery. Most patients with anal fissures will have pain and should seek at least a consult first to confirm the diagnosis of fissure.
I hope this helps and I wish you all the best for your treatment!