do NOT go to the GYM or running or things like that, if your real skinny and you cant help it then you only will get skinnier if u exercise no matter how hard u train, exercizing makes the fat u gain dissappear and thats not what u want, first you need to gain lots of weight by "living like a fast food junky" eat ALOT of burgers and shit that makes ppl fat, and after every meal you take a protein shake, living healthy is the reason why you are so skinny right now, might hard to comprehend but this is the ONLY way you are gonna gain weight, ok so when you did this for a couple weeks months and when you can see you got much more weight/fat THEN is the time when you start working out and get these muscles, trust me dont trust all the crap on the internet about eating wealthy stuff its all bullshit and will get u skinnier, you have to bruteforce it