Hi Amir how are you ,with your statements it appears that you are suffering with photo dermatitis
due to strong sun and extreme heat ,you should do followings :
1 . Avoid strong sun ,by putting on some cloth over your face ,put sun glasses .
2. drink lot of water ,to keep good hydration .
3. use Momentasone after bath and washing your face ,
4. frequent washing of face with mild soap and application of ice over face
5. Use Sun's cream before going in Sun .
6. You also have black pimple or open comedons in other words ,get it clean by some dermatologist
7. Have a good nutrition ,sound sleep to keep your face glowing.
Take care Dr Prakash Roy