Which treatment works the best and fastest for anal fissure?

Soften stool, baths. Eliminating constipation and softening stools are usually the primary targets when treating anal fissures. Such goals can be accomplished by taking daily fiber supplements and/or using laxatives. Sitz baths, during which the rectal area is immersed in warm water for 10-15 minutes, are also therapeutic and should be done 2-3 times per day. Sitz baths are available in most drugstores.
Diet and fluids. Regulating bm's by eating properly and drinking adequate flkuids along with variious tiopical agents may heal the fissure. In the more chronic or long standing cases, surgery may be necessary. Nothing is fast.