Has anybody had Hyponatremia? Or know something about this condition?

Hyponatremia occurs when the concentration of sodium in your blood is abnormally low. It can be dangerous if your salt level gets TOO low, so please don't let it. If you're drinking just tons of water, you may not be needing to. You can drink something which contains electrolytes, or maybe just put a little pink Himalayan sea salt in your beverages. That should, at leas,t help.