<s>[INST] My 15 year old son has a swollen left hand, in addition he has raised spots on his hands and forearms and on his legs. The spots ich and look like a cross between hives and swimmers itch. Symtoms started late last night with just the spots itching, Then progressed to his swollen hand. What do you think it is? [/INST] HiIt could be some allergy or insect bite.Show to a doctor.Meanwhile give give him Allegra 90 mg once a day, and Prednisone 4mg BD for 3 days.He may apply beclametasone ointments on itchy areas alsoA CBC blood count should be done.if has pain, give Tylenol.Avoid any other medication if was on before, consult physician.Look to any diet he's been allergic or intolerant to </s>