These bumps are quite common. The photo is not very clear but they appear to be flat warts. These may spread if you scratch or pick at them. Warts are caused by the Human Papilloma Virus. These are usually spread by direct contact. There are many strains of the virus and most are harmless.
The solution is to either use electro cautery or a carbon dioxide laser to burn them off. The treatment is relatively painless when treated with numbing cream.
The other differential diagnosis are closed comedones, otherwise known as white heads. This occurs when the pores are blocked and the oily sebum that is secreted is trapped. Retinoid creams such as adapalene, a second generation retinoid cream, can be used to break down the trapped sebum and clear the dead skin cells from the skin's surface.
I suggest a closer examination first before proceeding with your treatment.