Sunburns, probably. Put aloe vera or sunburn relief creme on them and wear sunscreen next time.
The circular discoloration spots on your back are most likely sun spots. These are caused from over exposure to the sun.
since blue fire is colder than red fire i would think red spots in the sun are colder than the normal yellow
heat rash
It can cause sunburns and tans leading to skin damage which shows up even years later as freckles and brown spots. Skin cancer can also follow years of excess sun exposure.
Freckles are spots that are caused by genetics or exposure to the sun. Freckles serve no real purpose other than aesthetics.
Through sunbathing, you can develop skin cancer from not wearing sun cream, wrinkles, dark spots on the skin and lots of freckles
Light brown spots or freckles are clusters of hyperpigmentation. The don't exactly hurt anything but they are a sign of sun exposure and the left hand is the one that gets the most exposure while driving. Dark or black spots that increase in size or change shape should be examined by a doctor.
Sun spots.
Could be vitiligo, from excess sun exposure.
sun spots are cooler parts of the sun
the sun spots like black little spots on the sun that explode every 11 years
Age spots are small brown spots found all over the legs and gradually disappear up the leg. Sun exposure and tanning beds can increase the formation of them.