Nodules are hard lumps underneath the surface of the skin which can be painful and last for several months. Nodules are much larger than those mentioned above. Unresolved nodules can sometimes leave an impaction behind, which can flare again and again. It is not at all advisable to squeeze or pop them. You may cause severe trauma to the skin and the lesion may last for months longer than it normally would. This type of acne is particularly vulnerable to scarring, so it is advisable to have it treated by a dermatologist.
Typically quite small. However, when they are grouped together, they become more visible. Just like whiteheads and blackheads, you should never attempt to force them away as it can leave unsightly and permanent scars.
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