What are these brown small spots on my upper arms? sunburn? why arms are darker than my face and legs. how to get it normal like other body parts? th

Could be freckling: Tanning is a function of exposure, so to even your tan simply cover the darker areas and expose the rest, OR use higher SPF factor sunblock on the darker areas and lower SPF on the lighter areas to even up the tan. Freckles happen when you expose your skin to sun and the melanin in your skin is released unevenly. It is difficult to get freckles to fade once they've appeared on your skin

Need more informatio: Sun burn is possibility given the amount of sun exposure in your country, but a little more info re what size, duration, any itching or associated symptoms and preferably a picture would be helpful to provide more specific answer.