There is a bag behind the ear, which is painless and has nothing to squeeze out for a month.
There are many kinds of hard pimples on the body, which usually occur on the skin. This phenomenon may be caused by virus infection, such as verruca vulgaris or verruca plana. It is mainly caused by abnormal hyperplasia of self-fibrous tissue, such as skin soft fibroma, and keloid caused by trauma, both of which will cause hard pimples on the skin surface.
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