i am 73 years old female and have the exact same symptoms. i went to my doctor thinking it might be shingles. she said no it was probably some type of allergic reaction maybe caused by anxiety. she recommended claritin which can be purchased over the counter.
for about 3 months 81-year-old father gets a rash on his body every evening. goes away and then comes back next evening. rash does not itch. on chest back arms legs.