Medical News Today: Possible causes of a lump on the back of the neck hairline

Lumps on the back of the neck hairline can be the result of skin irritation or acne or may be a sign of a new mole. Other possible causes include muscle knots, cysts, boils, and swollen lymph nodes. Learn more about these causes and when to see a doctor here.

from Featured Health News from Medical News Today http://bit.ly/2PdBieD