 [ Symptoms ] my daughter 25 had an episode of sweating dizzyness nausea fever numbness headache weakness and fainted also vision came and went lethargic&zoning out she laid over commode to vomit did not and was very hot she has a history of episodes of anorexiabelemia she also smokes occasionally and drinks alcohol  mostly lite beer very depressed has anxiety and panic attacks not seeing a dr no insurance and no drug abuse history at all she is 53 tall and weighs 100# she was at work and her boss only offered water and crackers i am concerned as is her husband that this may have been a heart attack [ Disease ] allergies and sinusitis can sometimes cause swollen lymph nodes in the neck but these usually go away fairly quickly if you have noticed persistent swollen lymph nodes under the arm it would be best to have them examined by your doctor