I have had a hard lump in my neck located left side below and behind ear.  It is painful.  Only on left side.  Inflammation in body has been a lifetime hurdle.  Do have a little psoriasis, I believe, on my scalp.  I know this can cause this lump but is it usually painful? How can I be sure that the psoriasis is the cause?
Hi, Welcome and thanks for posting your query to Chat Doctor. It appears from your query that you are suffering from psoriasis and along with it, you a have a pain fill ump behind the ear. Now you have not mentioned in your query since how long you have this painful lump. If it is from very short duration say for only few days then there is possibility of acute inflammation of lymph node. There can be second possibility of simple pyoderma of the scalp. IF the swelling was previously present and is now getting painful then there can be possibility of secondary infection in the cyst. As it is painful, so it is best to consult a dermatologist for the early guidance and treatment. Till that time you can take over the counter painkillers. Hope this information helps you. Chat Doctor. 