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.