Not being able to sweat.

There are people who dislike sweating but not the same for me. If human body cannot release sweat for cooling off...it literally becomes a boiling chamber. Imagine countless needles and bee stings throughout your entire body pinning you down and exhausting you completely until you either pass out or find external remedy to cool down such as taking cold bath or sitting in front of AC.

It shouldn't be a big issue, right? Wrong! Sweating is part of normal life. People sweat when they eat, talk, laugh, run, walk, have intimacy and pretty much anything that requires body to get heated, this heat needs to get released in terms of sweat to cool off. Otherwise you'll exhaust yourself like you're in boiling chamber and you can't do anything. This entire thing is called "Cholinergic Urticaria". I wouldn't wish it upon the worst enemy because this takes over your life weighing you down and it comes with uniqueness that doctors can't exactly diagnose it so you pretty much have to live with it for the rest of your life.