Boils on human body is a type of skin infection caused by a bacteria called Staphylococcus Aureus. It starts as a localized infection of hair follicles that will result to painful accumulation of pus. It can be transmitted from one person to another.
Boils on the human body could have a variety of causes. Hydradenitis Supperativa could be one cause, MRSA could be another. Always get evaluated by the doctor if you have re-occurring boils. You can also find more information here: www.webmd.com.