Hi and welcome to Healthcare Magic. Thanks for your question...
I understand your concerns. But having parasites / worms under the skin which come out penetrating the skin at times is not possible in any medical condition. This kind of belief is a part of a well known specific type of psychotic illness called delusional parasitosis
. Tests are not essential when the clinical diagnosis is clear. Your wife needs anti-psychotic medication
for this problem. So, please be assured that further tests are unecessary and if you really want to help your wife, please take her to a psychiatrist
and ensure that she takes medication.
Wish you all the best.
- Dr. Jonas Sundarakumar