Hi, the probabilities of the itching with rashes are Atopic dermatitis, Contact dermatitis, sweat dermatitis, seborrheic dermatitis and drug reaction.
You need to report if you have taken any suspected drug before this like sulfa drugs. Also any previous history of eczema, asthma, and allergic rhinitis should also be taken in to consideration.
Oral anti-histaminics and corticosteroid against prescription, which may help to alleviate these symptoms.
Various modality of treatment for vitiligo are Corticosteroids, Calcineurin inhibitors and Ultraviolet light. Approximately 55 percent of patients with localized vitiligo responded to mid potency topical corticosteroids.
Topical or oral psoralens plus ultraviolet A radiation (photo chemotherapy or PUVA), or ultraviolet B (UVB) radiation (phototherapy) is used in patients with more extensive vitiligo. I suggest you to consult a dermatologist. Take care and regards.
Have you been tested for Dermographism? Does your skin itch and blister or break out if you don't take your allegra for 1 to 3 days? Do scratches stay for long periods of time or leave scars? Have your doctor do the skin writing disease test. I always wondered why I could remove everything from my diet and didnt use perfumes and still get acne and nothing took it away. That was why. My allergist and dermatologist told me to go 3 days without allergy med, then when I went in I was itchy and she saw my scars and recognised what I had. She told me she had it too and only about 5% of the population has it. I also can not take NSAIDS (Anti-inflammatory) otherwise my skin will produce blood blisters :( I am much better now, but have to be careful of certain dyes and even certain foods.