Don't worry...you are suffering from photodermatitis causing this itchy rashes.. Specific medicine available for good control... Treatment depends on the severity..Do direct online consultation for detailed prescription by sending photos.

Hi This is polymorphic light eruption.

Avoid direct sunlight. Consult online for full treatment

This is called Photodermatitis, it is a form of allergic contact dermatitis in which the allergen must be activated by light to sensitize the allergic response, and to cause a rash or other systemic effects on subsequent exposure. Symptomatic relief can be obtained with emollients, topical steroids, and anti-histamines. Systemic steroids may be necessary for severe cases. Sensitivity to the sun may take several weeks to abate, especially with photoallergens from sunscreens. Consult with a Dermatologist for the same to prevent further progression of the lesions.