There is a bag behind the ear, which is painless and has nothing to squeeze out for a month.
According to the symptoms you described, there is a bag behind the ear, and there is no pain or itching. It may be sebaceous gland cyst, which is mostly caused by excessive sebaceous gland secretion, resulting in pore blockage. Generally, there is no obvious pain and itching. If that is not very big, it doesn’t need special treatment. Avoid stimulating him with his hands. If he grows up or has infection, he needs further treatment. Surgical incision is needed to completely remove the cyst.
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