When i go into sun my whole body feels like punched with pins for few moments and it goes down& its not regular . .some times there and smtimes not?

Allergy to sunlight: you may have an allergy to sunlight. Try taking an antihistamine and use sunscreen before your next sun exposure.

Don'tForgerSunBlock!: People can have sun reactions like that.Some feel real cold and may shiver for a while.Others may sneeze or cough.Some get an immediate headache.In your case I bet it's due to all the hair follicles tightening as you get hit with those rays Maybe a primitive response attempting to fluff and cover more skin with what was once fur. It could also be a momentary release of chemicals like bradykinin