Thanks for your query. Based on the facts that you have posted it appears that your boyfriend has multiple sebaceous cyst
and around.This area is rich in sebaceous glands hence bound to get multiple cyst.due to accumulation of sebum beneath the skin.
Normally these cysts subside without any treatment in a two to three weeks .However needs to be treated if they get infected.
Take some antibiotic like Doxycycline twice daily .and observe proper good personal hygiene. It should subside within 2 weeks.