Hello, the problem is artheritis with a rash
and an episode of headache. For the Artheritis with Rash, essential to have some basic investigations done as it could be due to a Viral artheritis, Reiters syndrome, Psoriatic artherits, Rheumatoid artheritis and SLE.
Thus it cannot be ignored and detailed examination would be helpful find the cause. Indeed, treatment would be Ibuprofen
like drugs, but some of these diseases would require long term follow-up and specialised care.
Lastly cluster headaches
do occur after a long interval, the symptoms are classical of a Cluster headache.
With best wishes