When I get hot, for example if I have a shower

Patient

Q: When I get hot, for example if I have a shower, bath, room temperature is hot or a hot coffee, I get a sudden feeling all over my body. It's not itchy as such more like a prickly sensation. I do come out in a small rash, usually on my wrists. It's unbareable. The rash and the sensation disappears soon as I cool down.

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When I get hot, for example...-1
Doctor

A:   Hi.
Thanks for your query and an elucidate query.

The history is suggestive that you have got a histamine release in response to all the factors you noted.
The excessive histamine release also causes the warmth, sometimes perceived as fever.
This is just an overactive sympathetic system ( part of the Autonomous nervous system).

I would advise you the following:
- Continue the antihistamine as before.
- To find the cause of the problems you may need a consultation of a Neurologist, Get MRI of the base of the neck for sympathetic nerve chains to see there is a tumor or something. This needs a detailed history taking, clinical evaluation, investigations to see if there are tumors producing such responses.This will be a tedious job but persistence will definitely lead to a possible diagnosis and treatment and may be the curative one.

I hope this answer helps you to get a proper discussion with your Doctors to come to a diagnosis and proper treatment

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