Thanks for your query.Based on the facts that you have posted it appears that you have multiple sebaceous cysts over base of the penis .
The skin in this area 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 take broad spectrum antibiotics along with topical antibiotic
ointment like Neosporin
twice daily .
Get the prescription of medicines from your family Physician.
Please consult qualified General Surgeon
for clinical evaluation and further treatment.