What are little tiny white pimples on my face, that appeared after sun bathing? (photos)

I have suffered from acne and taken antibiotics for 1 month, during winter and have used pharmaceutic cleanser, mask and cream. Now my acne is better and I have about a week that I use Loccitane cleanser and toner, which are with natural ingredients. Now I am on holidays at the beach and I have noticed little white pimples in and around my nose and close to my eyebrows, the oily area of my face. The second day after sunbathing I had more little white pimples.

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