The only thing that will work for this is not scratching. If you don't
scratchAllergy skin prick or scratch test
Allergy testing, the sores won't open and drain; if you do
scratchAllergy skin prick or scratch test
Allergy testing they will, despite use of any medicine. It would be best if you are able to get yourself to leave your skin alone. Then a skin doctor could see what, of anything, is going on. If you feel you cannot stop scratching, you will need help with that, as that is a symptom of
OCDObsessive-compulsive disorder, or
obsessiveObsessive-compulsive disorder
Obsessive-compulsive personality disorder-compulsive disorder. If that is the case, then treatment must be directed at the picking.
Best.
Dr. Rockoff