I got random gas poisoning disease immediately after eating a damaged and dried mushroom at Cherno hunting camp. There's no static or dynamic toxic zone. I started coughing and vomiting blood. After 25-30 minutes I lost all my blood and took a blood transfusion. The disease immediately disappeared after that.

So am I wrong or are these the symptoms and the cure of gas poisoning? And why did I get it from eating a mushroom?

I ate the mushroom, got immediately sick, and did nothing but sitting in the forest the entire time.