Can stress cause physical pain?

Lately I've been very stressed with friends, boys, school work, and home life. I stay up all night thinking, and in the morning I have mive headaches that make me just want to shut my eyes and never move. i get severe eczema on my feet and a bad rash in between my hands. I also have psoriasis on my hands. it all seems to get worse, badly inflamed, and more painfull during the peaks of my stress level. My muscles are all achy, and I'm falling asleep in cl all the time, even though I get an okay amount of sleep. I suffer from ADHD so I can hardly stop thinking, I feel it brings my stress level up. I'm 16 so I don't think I should be in this much pain. I'm literally falling apart. is it stress?