A scuba diver kept getting sick after dives — and their tight suit collar was likely to blame

Dear Doctor Roach: I’m a scuba diver, and I recently purchased a dry suit that is expectedly tight on my neck. During my first dive with it, I pulled the hood down, and within a few minutes, I immediately felt nauseous before even entering the water. I also briefly felt lightheaded and faint.

I removed the hood, loosened the neck a bit, and tried to relax.