Welcome to HCM.
Smoking does not cause boils or furunculosis or carbuncles, though it does harm your body in many other ways, most serious being lung cancer
These boils need to be treated with oral
antibiotics and local antiseptic
lotions or ointments, otherwise they will spread from one area to other. Consult a doctor immediately and yes quit smoking
before it's too late.
Wish you speedy recovery.