Everyone says the sun causes age spots, but few explain how. This guide decodes the real chain from ultraviolet light to the visible spot, separates UVA from UVB, and then bridges straight to the at-home fix.
- UV light signals pigment cells to make more melanin as a defense.
- Over years that pigment clusters and slow turnover locks it in.
- UVA penetrates deeper and drives long-term pigment changes.
- Existing spots need active treatment. Prevention stops new ones.
How Sun Damage Creates Age Spots
What actually happens under the skin?
Ultraviolet light reaches the pigment cells in your skin and signals them to make more melanin to absorb the radiation. With repeat exposure over years, that pigment clusters into concentrated patches. As we age, cell turnover slows, so pigment that would once have shed stays put and becomes a visible age spot. See the full location map and the hands example for where this shows up first.
UVA, UVB, and the Pigment You See
Which rays drive age spots?
UVB causes burning and surface damage, while UVA penetrates deeper and drives long-term pigment changes and aging. Both contribute to age spots, which is why broad spectrum protection matters. The American Academy of Dermatology covers this well, and Mayo Clinic is another solid reference. This is the same process behind sun spots.
An age spot is melanin that did its job, then never left.
Can Sun-Driven Age Spots Be Reversed
Once they form, can you undo them?
Prevention stops new spots, but an existing spot will not fade on its own, because the pigment is already deposited and turnover is slow. Active treatment is what addresses an existing spot. Be wary of any claim that a spot will simply disappear with time.
From Cause to Fix at Home
How do you go from understanding the cause to clearing a spot?
The practical path is prevention first with daily SPF 50, plus targeted treatment of an existing spot. The OcuraLife Plasma Pen is the at-home solution for clearing an individual spot, with the timeline below. Always patch-test and follow the manual. For the location specific protocol, see our by location removal guide, or the face example.
Frequently asked questions
How does the sun cause age spots?
UV light signals pigment cells to make more melanin. Over years it clusters, and slow cell turnover keeps it visible as a spot.
What is the difference between UVA and UVB for age spots?
UVB burns the surface, while UVA penetrates deeper and drives long-term pigment changes. Both contribute, so use broad spectrum SPF.
Can age spots from sun damage be reversed?
An existing spot will not fade on its own. Active treatment addresses it, while daily SPF prevents new spots from forming.
Does sunscreen stop new age spots?
Yes, daily broad spectrum SPF 50 is the most effective way to prevent new age spots from developing.
The OcuraLife Plasma Pen treats minor blemishes in about 5 minutes.
Shop the Plasma Pen