I have two swollen lymph nodes behind the ears. 1 just developed in a matter of hours and it's painful. Help!

Lymph nodes in these. Areas carry lymph from the scalp and ears. Since it is on both sides, assuming that your ears are ok, check your scalp. If you have psoriasis, eczema or lesions on your scalp, or a reaction to a shampoo it could cause this. If you are having an ear problem see an ENT or your family doctor. For a scalp or skin problem see a dermatologist or your family doctor.