is she using sunscreen, macules over sun exposed areas.  ashy dermatoses can be a possibility

Thank you for your suggestion. It might be something connected to sunscreens, especially fragrances. Ashy dermatitis is probably more persistent and more frequent in dark skin people.

      which drugs does she take ?

She doesn't take any drugs. She has just used different photoprotective creams.

In all possibilities looks like a reaction to sunscreen preservatives or additives. being quite non specific

Possibly an abnormal inhomogenous stimulatioin of melanogenesis by excessive exposure during summers.

A patch test with fragrances and sunscreen can confirm or rule out the contact dermatitis angle.

Solar lentigo  may occur in healthy white children and young adults even in the first decades of life . Lesions may be tiny or large usually light brown macules .When examined by dermoscopy , the pigmentes pattern is reticulated .

Thank you for your answers!

Ananta, which clinical entity an abnormal inhomogenous stimulatioin of melanogenesis by excessive exposure during summers should be?

Nurimar, which solar lentigo reappears in June and disappears in October?

I've examined the ingredients of the two pediatric protective creams the girl has used and found a number of potential contact and/or photocontact allergens:

octocrylene

glycerin

butyl methosydibenzoylmethane

bis-ethylhexyloxyphenol methoxyphenyl triazine

Glycyrrhiza inflata root extract

glicyrrhetinic acid

trisodium EDTA

disodium EDTA

phenoxyethanol

propylene glycol

ethylhexyl triazone

triethanolamine

tocopherol

terephthalylidene dicamphor sulfonic acid

I could not find any of these substances on the list of causative agents of pigmented contact (cosmetic) dermatitis. Does anybody know anything about that?

Lentignes /atypical freckling...Feel its  too patchy to be a contact reaction..

Ephelides or Freckling  is most frequent in individuals with red or blonde hair and blue eyes, particularly in those of Celtic extraction. Red-haired individuals with fair skin (and

freckles) have a significantly higher incidence of the gene encoding melanocortin receptors. They increase in number, size and depth of pigmentation during the summer months and are smaller, lighter and fewer in number in the winter. Freckles are a feature of a number of inherited and acquired disorders include xeroderma pigmentosum, neurofibromatosis, Moynahan’s syndrome and progeria.