2 doctors weighed in:
How come sunburns turn your skin red?
2 doctors weighed in

Dr. Michael Miller
Wound care
In brief: Inflammation
Radiation from the sun injures the skin.
Your body jumps into healing by creating inflammation to bring fresh healthy blood and healing factors to the area. The blood vessels dilate to get the healthy blood there and get the injured tissues healed. This inflammatory response makes things red, hot, swollen, and painful but, is absolutely necessary for things to heal.

In brief: Inflammation
Radiation from the sun injures the skin.
Your body jumps into healing by creating inflammation to bring fresh healthy blood and healing factors to the area. The blood vessels dilate to get the healthy blood there and get the injured tissues healed. This inflammatory response makes things red, hot, swollen, and painful but, is absolutely necessary for things to heal.
Dr. Michael Miller
Dr. Michael Miller
Thank
Dr. David Voron
Dermatology
In brief: See below
Ultra-violet radiation exceeding certain levels damages human skin by interfering with dna.
The skin responds to this injury (presumably as a result of evolution) by attempting to increase blood flow to the damaged area. The result is capillary dilatation manifested as redness.

In brief: See below
Ultra-violet radiation exceeding certain levels damages human skin by interfering with dna.
The skin responds to this injury (presumably as a result of evolution) by attempting to increase blood flow to the damaged area. The result is capillary dilatation manifested as redness.
Dr. David Voron
Dr. David Voron
Thank
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