Skin light sensitivity (photosensitivity)
Skin light sensitivity (photosensitivity) means you have an unusual reaction to light. This can cause symptoms like pain, redness, itching or a rash when the skin is exposed to light. These symptoms can range from very mild to very severe.
There are different types of light sensitivity conditions. Some are very common and others are rarer. They can affect anyone, including people of different ages and skin types.
Types of light sensitivity
Light sensitivity conditions can be put into different groups depending on what causes them.
Light sensitivity symptoms
Skin light sensitivity means that you get symptoms when the skin is exposed to light. Some common symptoms include:
- skin rash
- skin pain
- itching
- a burning or heat sensation on the skin
- blistering or fragile skin
- sunburn that happens very easily
These symptoms can range from mild to severe. Sometimes people may also feel generally unwell due to a light sensitivity disease. For example, you may get headaches or fatigue.
Although it’s rarer, some people may have unusual freckling or scarring of the skin.
Light sensitivity rash
Some light sensitivity rashes may only occur on exposed sites during summer. But, a rash that’s caused by light sensitivity can also happen:
- all year round
- through light clothing
- through windows and indoor light
There may be no rash on areas that have a natural shadow like:
- under the chin
- the upper eyelids
- behind the ears
You may also notice that the rash stops where you have been covered by clothing or footwear.
Diagnosing light sensitivity
Treatments for light sensitivity
A light sensitivity rash may be prevented with sun protection and by avoiding the sun.
Your doctor will tell you if you need any other treatments. This could include light-based treatments or immune suppressant treatments.
Psychological support may be needed if light sensitivity affects your day-to-day life.
You may also need to take a vitamin D supplement if you have a light sensitivity condition.