Blind pimples, also known as cystic acne or nodules, are deep, painful, and often large pimples that occur under the skin. They are typically caused by a combination of excess oil, dead skin cells, and bacteria that become trapped in the pore, leading to inflammation and infection. Unlike regular pimples that come to a head and can be popped, blind pimples are harder to treat and can be more painful. It is important not to squeeze or try to pop a blind pimple, as it can worsen the inflammation and lead to scarring. Topical treatments, such as salicylic acid or benzoyl peroxide, along with proper skincare and sometimes prescribed medications, can help in managing and preventing blind pimples.