Alex Visker, 19, suffers from an extreme allergy. He's allergic to all food.

There's no official diagnosis for Visker's case, but it's an extremely rare illness that comes from severe allergies and Mast Cell Activation Disorder, People reports. This means pretty much any type of food he eats will cause an extreme reaction in his body.

A tiny nibble of food is capable of making Visker vomit, send him into convulsions and cause bone pain. It can also drastically drop his blood pressure. The only way for him to get his required Solent-based nutrition is through a feeding tube into his stomach.

Heartbreaking illness aside, the young Visker still maintains a positive attitude. According to his mother, he cooks for his friends and takes his girlfriend out for ice cream. He's just happy not being stuck in bed.

However, when he does get cravings of the foods he remembers enjoying, he'll have to run off to his room to distance himself from it.

A GoFundMe page was started for Visker in hopes of raising $20,000 to defray his monthly $7,000 costs for medicine and send him to online college. As of publication, he's raised about $8,675.