I hope your rash is getting better you've had great suggestions here. I agree with others that it sounds more complex that the prickly heat which is how it started. I was just going to add that salt water heals wounds faster, think of swimming in the ocean with a sore, and it its not the spready type of rash, maybe a bath in mild epsom salts might sting alot but itch less and help healing. Maybe something to try. The ice mentioned above is really the best. Also, they make some numbing ointment you can put on or ask the doc to phone in some lidocaine--numbing liquid to put on it. I'm so sorry that this happened to you on holiday. I hope it isn't an allergy. I'm glad you are going to the doctor and hope you get better soon. There is another medication besides benedryl and that is called atavan and it is a pill and works too.
--Doctors are men who prescribe medicines of which they know little, to cure diseases of which they know less in human beings of whom they know nothing.--Voltaire (1694-1778)
Ills--Sjogrens-Lupus-like AI Disease, Hashis, Vitiligo, spinal stenosis/fusion with plate, salivary/lymphectomies, Diabetes, NAFLD, COPD, RLS, neuropathy, trigonitis, hystero, diffuse brain atrophy
Meds--Plaquenil, Evoxac, Metformin, Synthroid, HCTZ, Estradiol patch, Prosed, Klonopin, Soma, Ultram, Vicodin, Restasis, Albuterol,steroid injections, Protopic & Triamcinolone Acetonide ointments