Sir i having itching like something biting under my skin..most of the day i have same feeling..and mild burning sensation also.i met a dermatologist and some blood test done.all are normal..and i am having alaspan 10 mg for last 25 days.?

Could anxiety or chronic stress be playing a role here? There is a brain skin communication to explain such symptoms. Your dermatologist seems to have ruled out common causes if itching without an associated rash. To be sure, schedule a follow-up evaluation with your dermatologist. If anxiety could be a factor, stress management therapy could help.