The actual reason is as follows: 1, in the armpit, the neck appears line of small grains, not painful, consider is filiform warts, viral infection caused by the use of microwave removal can be. 2, the body of the grains appear mainly in the extremities of the limbs, not itchy or slightly itchy, local no sweat hair, touching with the hands a little stabbing, consider is perihistiasis keratosis, with vitamin E If you feel that it affects your beauty, you can go to the hospital for surgery to remove it.