A sun face redness and allergies are usually caused by chronic photodermatitis, polymorphic sun rash, solar dermatitis and other diseases.
1. Chronic photodermatitis: is a persistent, chronic photosensitivity skin disease, mostly due to long-term sun exposure, mostly in fishermen, farmers, crew and other outdoor workers. After sun exposure, the patient’s exposed parts (such as face, neck, back of hands, etc.) can appear scattered papules or edematous erythema.
2. polymorphic solar rash: the etiology and pathogenesis is not fully understood, with the environment, immunity, genetics and other factors related to the sun, the patient’s face, neck, forearms and other parts of the face, edematous erythema, papules and other manifestations, and can be accompanied by itching and other discomforts.
3. Solar dermatitis: easy to occur in late spring and early summer, because there is not enough melanin to protect the skin, so a strong sun exposure can trigger solar dermatitis, the severity of the lesions and the intensity of light and irradiation time and other factors related to the face, neck, forearms and other exposed parts of the edematous erythema, itching, blisters, or even vesiculoblasts, and will be accompanied by fever, nausea and other symptoms.
In addition, there are many other causes can cause a sun face redness and allergies, it is recommended to consult a doctor in a timely manner to identify the cause of the disease and follow the doctor’s instructions for treatment.