Hi
Tiny bumps on the penis are common. They can be due to pearly penile papules, fordyce spots, psoriasis and warts (papules); syphilis, chancroid, granuloma inguinale, herpes simplex, apthous ulcers, Reiter's syndrome (ulcers); and balanitis, posthitis, lichen sclerosis, psoriasis, and eczema (plaques).
It may be very difficult to assess your problem without clinical examination. However, one possibility can be Fordyce's spots.