Back of the neck lumps, there may be the following two conditions lead to: first, there may be subcutaneous soft tissue swelling, common sebaceous cysts, fibroids, lipomas, etc., generally benign swellings, can be localized ultrasound, basically able to identify and diagnose. If there is no obvious localized pressure and pain or enlargement is relatively fast, and it does not affect the appearance, it does not need special treatment, if you really deal with it, it must be surgically removed. Secondly, it is possible that the muscles at the back of the neck have localized strain, or inflammation and localized hard knots, which will generally feel swollen and protruding when pressed, and there will be pain when pressed.