Hi, I have some allergy in my left forearm persistent for nearly 2 years. Issue started in 2018 but it was not prominent then. But for the past two years its very itchy and its spreading all my forearm and only in my left hand. Consulted with three dermatologist and all of them diagnosed it as sun allergy. Applied creams nothing helps.  On exposure to sun it aggreviates so I use arm sleeves and it helps to an extent. But still it persists.When I apply any topical cream or lotion it starts to itch badly until I wash it off. Itching is irritating and these days I develop wounds due to stratching.I even consulted ayurveda and homoeopathy.It doesn't help. I also have allergic rhinitis and allergic to dust.