Sun sensitivity during chemotherapy and how to cover up

This page is for people on chemotherapy whose skin now burns easily in the sun. It explains what is known, what to ask, and how to protect your skin.

One odd surprise of treatment: half an hour in the yard now does what an afternoon at the beach used to do.

NCI names this effect. Writing about skin changes during cancer treatment, it says you may develop a minor rash or sunburn easily. This is called photosensitivity. NCI says some types of chemotherapy can cause it.

This is a real, documented effect. It is not you being oversensitive.

You probably came here wanting a list of which drugs do this. Federal sources do not give one, and making one up would be irresponsible.

NCI describes photosensitivity as an effect of some chemotherapy in general terms. The FDA's page on sun sensitivity and medicines gives these examples of drug types that can trigger it:

• antibiotics (for example doxycycline).
• antihistamines.
• cholesterol-lowering drugs.
• diuretics (water pills).
• anti-inflammatory drugs (NSAIDs).
• oral contraceptives.

This is not a full list, and it is not a list of cancer drugs.

So the drug-specific answer has to come from your own pharmacist. They have your regimen in front of them. Ask this at your next visit: does anything I am taking make me burn more easily, and for how long after each dose?

The FDA splits drug reactions to sunlight into two kinds. The difference is useful to know.

Phototoxicity is a skin irritation that can happen within a few hours of sun exposure. The FDA calls this the more common type.

Photoallergy is an allergic skin reaction that may not show up until several days after sun exposure.

That delay is why people miss the link between a rash and the sunny afternoon that caused it. If a rash shows up days after time outdoors, mention the sun when you describe it to your team.

Both types, the FDA says, come from ultraviolet light, whether from natural sunlight or from tanning booths.

NCI's advice for skin changes during treatment is specific and practical:

• Use sunscreen and sun-protective lip balm.
• Wear a loose long-sleeved shirt, pants, and a wide-brimmed hat outdoors to prevent sunburn.

The FDA adds broader sun-safety steps:

• Seek shade, especially between 10 a.m. and 2 p.m.
• Wear protective clothing, such as long sleeves, pants, sunglasses and broad-brimmed hats.
• Use sunscreen with an SPF of 30 or higher.

Clothing does a lot of quiet work here. Unlike sunscreen, a long-sleeved shirt does not wash off or need to be put on again.

Skin in a radiation treatment area has its own rules. Products that are fine elsewhere may not be fine there, so sunscreen advice for the rest of your body may not apply to a treated area. Ask your radiation team what is allowed on that skin, and when.

Tell your team about any new rash, any burn that seems worse than the exposure should cause, and any skin that blisters, weeps, or does not settle within a few days. Skin problems during cancer treatment deserve a professional look, not a home remedy. Ask your team about this, especially if your infection risk is higher than normal.