Acceptance as a physical disease is still slow in the Allopathic Medical field. The chemically hypersensitive can't take drugs. Since pharmaceutical companies are chemical manufacturers, no money is diverted to research that doesn't increase their bottom line.
That being said there are treatments that are working. First and foremost, avoidance of all toxins. Foid, environment, everything. Next get a biometric test for environmental toxins and nutritional deficiencies. Work with an integrated Environmental Illness practitioner to remediate those . Have your genomes mapped and have someone like Dr. Amy Yasko interpret it for you. Access her books online for free. Brilliant woman! Work with your EI on any variance issues you may have.
IV glutathione and IV Bs 5&6 with magnesium and C have helped many sufferers. As has hyperbaric oxygen. I have not had the latter. My condition was so severe I couldn't access it.
I've found certain homeopathics helpful, like Nux Vomica, and Lymphamyasote. I've also found acupuncture, shiatsu massage and IR sauna helpful.