Boils over body. The severity of this?

Hi, I'm having pimple like boils size of 25 paise coin over my butt, inner thighs, waist, behind ear and armpit. This comes and goes many times in a year. But this time it's been increasing by number. When this boil breaks it pains and a little pus & blood comes out. &It dries off. I often have outside food since my work is onsite. Before marriage my mom used to give me B complex tablet. And thought it might be because of body heat, so drank lots of tender coconut water.. and applied castor oil and turmeric powder to the boils. Even though it disappears for a while, eventually it happens again. What might be the reason for this and is there any treatment to be done? How do you rank the severity of this? Note: *it comes and goes for more than 4years now *Boils pains and appears near private parts and butt especially *Starting no pus just swell and finally a little pus at the top and bleeds when breaks *After dry becomes knot like and leaves mark