what ailments do you need to get the card"not scamming"

I have patellofemoral pain syndrome witch means my knee is screwed up I'm only 18 and would like to get a card to be legit any advice would help

have you talked to a doctor about it? thats always a good start.

U can get it ez....btw, there is no such thing as non medicinal use of marijuana therefore no such thing as scamming