Phototoxic reaction it is and could resemble burns.Mupurocin creme external helps.Consult our doc.
Depending on the degree of involvement of the skin and the damage done to the skin,sun burns may take a day to more days to heal.
Avoid using any lotions and creams for the meantime.Use a mild cleanser with moisturizing properties like Cetaphil. Also apply aloe vera or calamine lotion on the sunburns.If the symptoms still persist then you can apply mild steroid like dermacort.For the itching antihistaminics like Benadryl or Claritin can be taken.
Hope it helps. Take care and pls do keep me posted on how you are doing or in case you have additional queries. Kind regards.