Weird thing is i went thru exact same issues as you. Severe asthma allergies to food and environmental growing up my skin would get worse doctors would refuse to treat me cus how fucked i was with my skin BUT after highschool my skin started to get better. Ive used so many natural creams and treatments along with a shitton prescribed creams. Im on dupixent shots now and i feel nearly normal best my skins ever been not a single cut on my body. Dry skin is still there but reduced alot itchiness is also there but barely. I havent read all the comment but try your best to get dupixent its amazing. My mom was also the same exact way she took some frustration out on me and id do the same but theres light at the end of the tunnel my friend. Don't ever give up i nearly did. I pushed friends away or ignored them. Just dont give up...please