Hi there. From your clinical description assuming it is accurate, then the condition you ail from is most likely to be Lichen Nitidus & in your case, probably a condition called a lichen nitidus type of PLE (polymorphous light eruption) that is aggravated or precipitated by the ultraviolet light assuming your issues began or worsened by the beach. Please do use a recommended sunscreen at least 20 mts before you step out & reapply each 3-4 hrs at least with re-application every time you wash off or sweat profusely or swim. Alternatively please do visit the nearest dermatologist for further interventions. As it is non-itchy or mildly itchy, an antihistamine may not be required but perhaps a mild peeling agent in the evenings with a built in moisturiser will go a long way in getting yourself rid of this issue quicker. Good Luck & do feel free to upload your photos on this HCM website & you may use the premier portal to directly send it to me should you desire privacy. Cheers! Dr Praveen Rodrigues MD