Hi, i’ve had a rash on my arm for around

Patient: Hi, i’ve had a rash on my arm for around 6 months now. It started with 2 very small spots but has now spread the length of my forearm with open sore type things too. It is itchy all the time! I have tried many things such as tea tree oil, tcp, moisturisers, barrier cream, aloe vera. Obviously I don’t want to waste my gp’s time. Is there anything else I could try? Many thanks, Amy

Doctor: