I believe that reaction is caused by insufficient flushing of waste and toxins from the body,
as well as water retention in a moist environment that causes Dampness.
To see a good Acupuncturist and helping with acupuncture and Chinese herbal therapy
would heal skin conditions, which provides longer-lasting relief than Western methods.
In Traditional Chinese Medicine, the 2 main sources behind skin problems are believed
to be Heat & Dampness.
The term Heat refers to distress in the body which can be triggered by overwork, overexercise,
or over-activated hormones in a wet environment and suppressed emotional anger.
In a more sensitive person eating Chocolate and drinking Coffee can cause "Toxic Fire" retention,
which is difficult to get rid of the body.
Actually periodic sweating helps to detoxify your body.
Do you have also migraine headache once in a while
Take it with a grain of salt, but that's my idea