Hi there ~
I understand your concerns. However, it is very unusual to have this condition of the skin splitting only in the region of the median raphe. I also believe that you might need to consult a dermatologist
to see if this a condition that needs to be treated with a specialist. In the meantime it would help to keep the area clean and dry and let it heal. Taking vitamins
especially vit. C is helpful in the healing process. I hope this helps.
Take care and have a lovely day!