Hi and welcome to HCM From your description of rashes and developing headache, they could be also a viral rash. Watch for symptoms of fever , joints pains, flu etc as rashes can appear in viral infections before the other symptoms. Yes, it is unlikely to be chicken box. Note the distribution of the rashes, if they are spreading randomly over the body, or are in a particular area, like in shingles, associated with fluid blisters or burning. Viral infections generally follow a fixed course and resolve on their own. If you feel sick, you may see a doctor for symptomatic treatment. As for the rashes, take an antihistamine like levocet or benadryl for a few days to stop the itching. That will also control any possible allergies. Calamine lotion will help soothe the skin. If your rashes are actively spreading, you may need a steroid shot or cream after consulting with a dermatologist/physician. Start with the treatment as advised, observe for a couple of days and see a dermatologist to confirm further diagnosis and treatment. We also cannot completely rule out new allergies that you may have developed, so try and recall any possible exposure to new foods, drugs, applications, outdoor activities,plants,pets, insect bites/bugs, etc. Also keep a check for similar complaints in family members or contacts. Hope this helps.