#5 – Porphyria
Porphyria is not a single disease, but a group of diseases. In a nutshell, this disease creates substances called porphyrines which build up in the body, especially in the nervous system, and it can be fatal.
Luckily, there is treatment for porphyria. The disease presents itself with various skin lesions which can automatically be recognized as porphyria by an expert dermatologist.