Short-term illnesses like urinary
, gastroenteritis, vomiting, cramping and
diarrhea all can lead to these symptoms. Respiratory illnesses like pneumonias, streptococcal infections all can lead to hot and cold flushes. Anxiety, thyroid disorders, hypotension, hypoglyceamia, tuberculosis are other causes. Ant bites should be treated symptomatically. If he is having itching antihistaminic may provide relief, Seek medical help. Do write to us again on how he is doing.
Best of luck!