Any advice/ help appreciated! At a loss..

Around January last year my boyfriend started getting itchiness on the side of his left leg, ankle and between his toes. At first he was told it was eczema/fungal and athlete’s foot, then he started to get white puss spots on his leg and ankle. It flared up massively and got very sore, the doctors have given him every cream and steroid possible, we have also brought every cream, ointment, spray etc that could possibly help and nothing has. The only thing that has given him some sorta relief is taking an antihistamine every day however, after about 8-10 hours it starts to itch again to the point he would tear himself apart if I let him. It shrunk a lot in the summer last year and then came back around September, mainly in between his toes and ankle, now it’s coming back on his leg. His skin is peeling really bad on his foot and his ankle is so inflamed with it. The doctors don’t think it’s psoriasis but has anyone have any idea what this could be or what could help as we are struggling at this point. Photos will be included of start till now.