I've told my doctors and ENT that it feels like I'm "drowning from the inside" just on the left side of my head. It comes with exertion, overheating, and if I look from side to side too much (like when you're out shopping) I feel a warm fluid like feeling on the left side of my head, then my ear gets muffled and it sounds like that ear is underwater. It's very disturbing. I started getting that, then it would only come sporadically. Then I had 5 episodes of sudden deafness I the left ear, and regained my hearing after strong courses of corticosteroids. The ENTs initially thought Meniere's, but the VEMP test and lack of vertigo proved negative. They still don't know the cause. After the last episode of sudden deafness, I have had the fluid issue every day that I try to be active, even just cleaning the apartment can trigger the fluid weirdness. I take antihistamines every 4-6 hours to lessen the severity of it. But it's freaky that the specialists are stumped. They prescribed me a diuretic believing that I must have some problem regulating the fluid in my vestibular system.
In general, have been diagnosed with: IBS-C, migraines, chronic sinusitis, toxic multinodular goiter, sudden deafness, anxiety, depression, OCD, possible UC, TMJ, getting testing for sleep apnea.