Hi. This is a classical finding of a fissure-in-ano, you have described. Occurs due to strain at pooh as you have rightly mentioned. The simple treatment which you do at home is :: High fiber diet mild laxative at bedtime Have a Sitz bath ( in a tub with warm water ) to sooth the area. If you maintain these suggestion, you may get cured and there may not be a recurrence unless there is constipation. But if you have symptoms of more than 6 months or more than 3 attacks till now, it would be wise to consult a Gastro surgeon, He would advise conservative treatment as I have already directed and may add an antibiotic and metrogyl if he thinks of a infection too. Some patients may require a simple dilatation under general anesthesia if medical management fails to heal this.