Hello,
Without external examination it is very difficult to confirm a diagnosis, but the various possibilities for your symptoms are folliculitis(might only be felt as small lumps in the
skin commonly with a hair arising from
centre) , pearly penile papules(multiple, small (about 1-3mm) papules running around the circumference of the crown of the glans penis) , Fordyce spots (small (1-5mm) bright red or purple papules that can appear on the penis and usually effect younger men), sweat dermatitis