I walked for 2.6 miles in 88 degree heat and humidity. I barely sweat and my face gets really red and my hands swell up so bad that i hold them up while walking. I have been reading that this can be a symptom of hypothyroidism. It's called Anhidrosis. I am scared that I will overheat sometimes. I might be a little dehydrated as its hard to not drink during meal times.

Anyone have these issues?

I'm the opposite. If the word hot is even mentioned I sweat. Hate it

I do both. My hands swell when I walk, they always have and I sweat profusely. Check with your doctor.

I have hypothyroidism and I also don't sweat much while working out, in fact hardly at all.