It seems that you may be having atopic dermatitis
You may be having atopic diathesis.
There are so many factors which precipitate your disease.
Dry weather,sun exposure,soap,cosmetic,house dust,house dust mite,grass,wool,
perfume and other allergen.. Even dietary factors like cow milk,peas and nuts, eggs,chicken,fish,prawns.etc can precipitate or exacerbate atopic dermatitis.
Mild steroid cream or tacrolimus or pimecrolimus
oint may improve the disease
Antihistaminics like levocetirizine
or loratidin may be taken to relive itch or irritation. If the condition is embarassing , you may take oral steroids in tappering dose.
You consult dermatologist
I hope you got my answer.
Dr. Ilyas Patel MD