Suggest Treatment For Enlarged Glands On Neck In Children

Hi our 21month old son has got very enlarged glands on his neck and he keeps coming up in a strange hive like rash that comes and goes quickly. We have taken him to the doctors four times over the last week, it all started with a sore throat and temp. Hes been off his food too. The doctors say it is viral? and there is nothing they can give him. Is it worth another trip to doctors for another opinion. Very worried mummy!