Welcome and thanks for posting your query to Healthcare Magic.
After reading your query it appears the possibility of "Actinic dermatitis".
You have not mentioned your age and the time period since you are having this problem.
It is common condition cased by the direct sun damage to the skin leading to sun sensitivity. Furhter exposure to sunlight aggravates the situation.
For the prevention and betterment kindly follow the suggestions below:
- stay away from hot and humid climate.
- Do not scratch any skin lesion or even try to touch unnecessarily.
-Apply over the counter calamine lotion 3-4 times a day.
-You can do cold water compresses to reduce the intensity of itching.
-You can take oral anti histamine
or levocetrizine under medial advise.
- You can apply Fluticasone
cream under dermatological guidance.
Your mediation "Arimidex" is not related with this situation so you can very well continue the same according to your doctor's suggestion.
Despite above measures if the problem is not getting better then it is better to consult a dermatologist
for best guidance.
Hope these informations will help.
"With good health wishes"
Dr Sanjay Kumar Kanodia
MD (Dermatology & STDs)