There are several disease or you can say medical conditions that you would not be knowing about.
Here are the few, which really exists, take a look:-
#1 Cutaneous horns – this condition gives the patients a hard material above the surface of skin that looks like horns
#2 Macrodactyly – it causes swelling at some part of body. Usually found in kids, by birth or within few years of birth
#3 Epidermodysplasia verruciformis – it’s an extreme skin disorder causing horrifying damage of skins
#4 Noma – this affects mostly young with bad hygiene and nutrition
#5 Maggot Infestation – Maggots start to live inside some part of body and even eat from inside
#6 Neurofibromatosis – condition that damages the skin tissue and stops creating new
#7 Polymelia – it causes development of several limbs in the body
#8 Werewolf syndrome – it causes hairs all over the body