Hello
The skin lesions you have mentioned may be due to
polymorphous light eruption,
photosensitivity reaction or early stage of systemic lupus erythromatosis.
It is a kind of
allergic reaction due to increased sensitivity of skin to sunlight.
You need to visit
dermatologist to rule out the cause.Skin biopsy,blood test and patch test may be done to know the underlying cause.
If it has not responded to medical therapy ,dermatologist may take help of light therapy in various visits to increase tolerance of your skin to sunlight.
The rashes can be managed by
-oral antihistaminics like cetrizine/loratidine,applying
hydrocortisone containing ointment at the lesions.
Local application of cold compresses may help.
For its prevention,you have to
-Apply sunscreen lotion with SPF more than 30.
Cover your body with full sleeves and use broad brim hat whille in sun.
-Avoid exposure to sun when sunlight is at its maximum.
-Intake of variety of fruits and vegetables in daily diet will provide you with anti oxidants and vit B .Vit B deficiency may accelerate such reactions.
-Be careful of certsin drugs that may enhance the allergic reaction in sun like doxycylcine,alcohol.
-Moisture your skin well and keep yourself hydrated.
Thanks