This problem is normally located on the face, back, and upper portion of the chest. These areas are worst hit because they have the highest number of oily glands. What a lot of people don’t realize is that there are several different types of this issue. And to make matter even more complicated, each of these types have their own causes and effects as well as methods of prevention. 
Resorcinol – Almost always found coupled with sulfur, this ingredient breaks down hardened, rough or scaly skin, while disinfecting and fighting infections5. This ingredient is often used topically to treat pain and itching stemming from small injuries like scrapes and cuts, burns, bug bites, sunburn, poison ivy and more. It’s also used to treat skin conditions like eczema, seborrhea, psoriasis, warts, corns and other disorders. It is generally found in strengths of up to 2%.
How to Handle It: Consider salicylic acid your secret weapon. "This beta hydroxy acid helps remove excess oil and exfoliate dead cells from the skin's surface to keep pores clear," says Zeichner. Try Clinique's Acne Solution Clearing Gel, a two-time Best of Beauty winner that packs both salicylic acid and sea whip extract — an ingredient with skin-soothing properties — to help counteract the dryness sometimes caused by salicylic acid. The formula does double duty: It works as a spot treatment for mild to moderate acne and as a nightly allover treatment for pimple prevention. And since it dries clear, you can wear it to fight zits whenever, wherever.
Oftentimes, our first instinct when we encounter bumps, pimples and other blemishes on our skin is to touch it. But if you’ve been dealing with acne for a while, you’ve probably learned by now that these practices only make acne and skin problems worse. For starters, our hands come into contact with more bacteria, pathogens and contaminants than any other part of our bodies. Even when we try to wash our hands often, there is only so much of that we can avoid putting on our faces every time we reach out to touch it. So, there’s the fact that we could be adding harmful bacteria our facial skin to begin with. But it doesn’t end there.
Scientists initially hypothesized that acne represented a disease of the skin's hair follicle, and occurred due to blockage of the pore by sebum. During the 1880s, bacteria were observed by microscopy in skin samples affected by acne and were regarded as the causal agents of comedones, sebum production, and ultimately acne. During the mid-twentieth century, dermatologists realized that no single hypothesized factor (sebum, bacteria, or excess keratin) could completely explain the disease. This led to the current understanding that acne could be explained by a sequence of related events, beginning with blockage of the skin follicle by excessive dead skin cells, followed by bacterial invasion of the hair follicle pore, changes in sebum production, and inflammation.
Acne removal: Your dermatologist may perform a procedure called “drainage and extraction” to remove a large acne cyst. This procedure helps when the cyst does not respond to medicine. It also helps ease the pain and the chance that the cyst will leave a scar. If you absolutely have to get rid of a cyst quickly, your dermatologist may inject the cyst with medicine.