Many people don’t even realize they have hypercapnia.
On the other hand, symptoms of severe hypercapnia are more pronounced. Severe hypercapnia may eventually lead to respiratory failure and possibly death. Symptoms and signs may include:
- Paranoia, depression, and confusion, which may progress to coma
- Muscle twitches
- Dilation or widening of superficial veins in the skin
- Papilledema — a sign of increased pressure in the brain