Not sure he won't come on line so I will
yt -now has severe SHARP headache near the pemperal area with pain down down his spine as well very fatigued, no apitite, , still has nause this AM (sorry for the typos) he is very active a local ski instructor so takes care of himself does have an issue with the thin membranes in his nose gets severe nosebleeds easy
Post-flu symptoms are more likely.
Hello and welcome to 'Ask a Doctor' service.
I have read your query and here is my advice.
The symptoms that you are asking for, may follow after the initial flu symptoms.
Four days is a relatively short period of time for these symptoms to subside completely.
In my opinion, it is necessary to continue the OTC medications for another few days, a lot of fluids (mainly luke-warm water, soup, tea, and fruit juice) and plenty of rest.
If these symptoms don't improve in a week or so, an evaluation by the primary care Doctor is necessary.
An easy nosebleed may relate to episodes of high blood pressure also, so, monitoring the blood pressure is also recommended.
Hope you found the answer helpful.
Let me know if I can assist you further.