Thanks for your query,based on the facts that you have posted it appears that you have multiple sebaceous cysts over penis and scrotum
The scrotal and penile skin is rich in sebaceous glands and hence prone to get more sebaceous cyst due to accumulation of sebum beneath the skin.
Normally they fade away without treatment however they need to be treated if increase in size or get infected.
Please consult qualified General Surgeon
for clinical evaluation and further treatment.
You need to take broad spectrum antibiotic like Cefexine along with anti inflammatory drug like Diclofenac
If needed some of them which are bigger may need to get excised in Toto (Completely along with the sac)