Symptoms
Lump Behind Ear: 7 Possible Causes (& When to Worry)
A lump behind the ear may stem from swollen lymph nodes, acne, or sebaceous cysts, as well as mastoiditis or lipomas. While usually painless, signs of infection like redness require care. Consulting a doctor is vital if the mass grows, hurts, or persists, as treatment ranges from antibiotics to surgical removal.