Clogging of oil and dirt in the skin causes bacterial infection at the clogged pores. Sometimes, acne manifests itself in the form of pus filled cystic acne. The infection and inflammation can spread deep beneath the skin and affect surrounding tissues. Such acne is very severe acne can be difficult to treat. Dermatologists usually prescribe antibiotics to treat the infection. It may take some time for the infection to clear up. Sometimes, it takes as much as 6 months. It is essential to keep the affected regions clean and dry. Wash your face using a mild cleaner and pat dry with a clean, soft towel. Don’t touch the pimples often or pop the zit. This can worsen the infection. You can use lotions or face washes containing tea tree oil or witch hazel extracts on your skin. This will reduce inflammation and help to soothe the skin. If you have acne cysts on your skin, your dermatologists may recommend using creams with retinol, salicylic acid or benzoyl peroxide. These compounds are very effective in treating severe acne. Applying a hot compress over the pus filled acne sores and steaming your skin regularly can help open up pores and avoid clogging. Use deep cleansing face masks to get rid of acne under the skin. You can also use home remedies made using baking soda, turmeric, rose water or vinegar to help reduce under the skin acne.