I hear no diagnosis here.
It dose appear seasonal so might be allergic.
If so a medication such as claritin might help, as it is a long acting antihistamine, and does not have interactions with elavil...and in the states at least, there is an over the counter form.
To really get to the bottom of this a small skin biopsy of the rash should be sent to the lab..as this could be a form of eczema [different treatment] allergy, contact sensitivity, or autoimmune reaction, which the biopsy would sort out.
Great home remedy for itch
1 gallon milk in the bath.
good luck again
Let me know if you have further questions
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