My husband 2 wks ago had a itchy spot on his left chest/shoulder junction area --then it turned to a red rash (incredibly burning and itching (24 hrs) keeping him up most of the nights for these 2 wks) then 'additionally' --spread across chest then up on left sideburns then--jumped to right sideburn area, --then neck--then forehead.. We've used tea tree oil, a allergy pill that make one drowsy at night. (He's 72 and has been in the sun for his whole adult life and had melanoma one year ago on the left chest area and a few of his left lymph glands under the left arm taken out. We live on a Greek island.