my 13 yr. old son has cracks around his sphinkster . he said he has had them for years . I just found out about this. he was using a lot of wet wipes so I asked him if every thing was alright. he said my ex wife has known this for years. im concerned . he has cronic bloating and diaria . my ex recently had him checked for food allergies. the result was 1 for wheat 2 for soy 1 for dairy. very low , but for 2 months now I have got him foods without these things. he has told me he feels 50 to 60% better. I am seeking info on and diseases that have this MO. THX!

Summarized question: What causes cracks around the sphincter?