My 18 yr. old son had, what appeared to be flu symptoms, six days ago. No head congestion, just body aches, fairly severe headache & fever up to 102. Naturopathic doc on Friday did find a remedy that eliminated body aches, & fever did lower to normal after four days. Now, day six, he is having "hot flashes" & the headache is still with him. No intestinal issues, good appetite, energy to do things . . . the headache & fluctuations in body temperature ("hot flashes" mainly at night) don't add up to anything I know about. Excedrine seems to address the headaches, until it's time for more.
What IS this?