Thanks for your query.Based on the facts that you have posted it appears that you have
Sebaceous Cysts over 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 ensure to observe proper personal hygiene by leaning you r genitals and scrotum with warm water.