Painless lump behind the ear could be Lump behind the ear could be folliculitis (hair follicle infection), lipoma (localized collection of fat), a cyst, an inflamed lymph node or a neurofibroma (localized harmless swelling
in of nerve and connective tissue). Watch the
lump. Do not touch everyday but once
in 10-15 days. If the lump increases in size, becomes painful, changes color, bleeds, changes shape or consistency or more similar lumps appear then consult a doctor.
Hope this helps.