What Is Sun Sensitivity?

The light sensitivity test is a test for sensitivity to sunlight, and is a test for the intensity of the immune system's response to sunlight. Common diseases caused by light sensitivityphotosensitive dermatitis include solar urticaria, chemical photosensitivity dermatitis, and pleomorphic solar rash. It is characterized by a pruritic, sudden rash in areas exposed to sunlight. This light-sensitive constitution can be inherited. Common diseases such as systemic lupus erythematosus and polyporphyria can also develop after exposure to sunlight.

Name: Light sensitivity test

category: Special inspection

Photosensitivity test normal value

Under normal circumstances, people have a burning sensation when exposed to the sun for a long period of time, and more serious are minor skin problems. If a series of serious skin problems is caused what skin is not within the normal range.

Clinical significance of light sensitivity test

Abnormal results: solar urticaria, dermatitis, pruritic sudden rash, skin relaxation, dryness, roughness, wrinkles or deepening of existing wrinkles, skin keratinogenesis, cell atrophy, capillary dilation, etc. People to be checked: People suspected of having photosensitive dermatitis.

Precautions for light sensitivity test

Unsuitable people: Patients with systemic lupus erythematosus and polyporphyria are contraindicated before the test: avoid exposure to a large amount of ultraviolet radiation or eat some light-sensitive vegetables for a long time or in the sun. Some things in life may increase the body's absorption of ultraviolet light and should be avoided as much as possible. Avoid cosmetics that work with phototoxic dermatitis. Do not eat drugs that cause phototoxicity. Examination requirements: actively cooperate with the doctor

Photosensitive test inspection process

Phototoxic dermatitis is a limited flaky erythema with a burning sensation or pain. In severe cases, edema and blisters or conjunctivitis and systemic symptoms such as headache, dizziness, fatigue, thirst, and nausea can occur. Those with the following conditions can be diagnosed: (1) there is a clear history of occupational exposure to a certain amount of light-sensitive substances before the onset of illness, and exposure to sunlight at a certain intensity and time. (2) Skin lesions occur in areas that come into contact with light-sensitive substances and are exposed to sunlight. (3) Most people develop the disease under the same job and under the same conditions. (4) Skin lesions begin within hours of exposure to sunlight. (5) Derived from contact with light-sensitive substances or avoiding sunlight, dermatitis resolves quickly, and localized pigmentation can be left to varying degrees. (6) Spot patch test can be done if necessary, showing sunburn-like reaction