I have a right arm that sometime gets red and hot to touch, it ictchs so bad that I use ice cubes to stop the itching I was told my Derm dr I a had exzcema there isn t any rash an only on one arm he gave me some lotion to put on it,,I cant believe his diagnoses because it is only on arm and he gave me another tube to help the red disappear,, but it was $600 a tube and I can t afford that. what is your opinion