My infant son has blisters on his testicles. what can be thereason for it? please suggest some treatment.

Have to see it: A lot of infants are born with something called "pustular melanosis", an innocent newborn rash that looks like small pustules that rub off and turn dark over the next few days. They last a few weeks to months in color, then fade. If it's not that, then the pediatrician should look at it right away.

Are you sure...: ...That they are blisters? Sometimes follicular papules, or small viral bumps called molluscums, can resemble blisters. If they are indeed blisters i would think about diaper rash, an allergy to something you are applying to that area, and (less likely) a yeast infection. You really should show it to your pediatrician or a dermatologist.

Blisters: Blisters on the testicles can be a contact dermatitis which is an allergic reaction, bullous staph which is a bacterial infection, herpes simplex which is a viral infection. Take your son to the doctor for diagnosis and greatment.

Viral infection?: Blisters on your child's scrotum could be due to coxsackie virus, which also causes blisters on palms, soles, and oral mucosa. The blisters could also be due to diarrheal illness with significant skin irritation and ulcers also on buttocks. See your pedi for further examination.