Sudden burning pain in the face is mainly considered to be related to solar dermatitis, contact dermatitis, cryptococcal dermatitis, etc., which needs to be analyzed according to the symptoms. 1. Solar dermatitis: acute phototoxic reaction that occurs in the exposed skin after intense sunlight exposure. Exposed parts of the diffuse erythema, bright red, clear boundaries, lesions can be more serious edema, blisters, can be broken and crust. Localized self-conscious burning pain, which can be manifested as a sudden fiery pain in the face. 2. Contact dermatitis: If the face is in contact with allergenic substances or irritants, inflammatory stimuli can cause the face to suddenly appear hot and painful symptoms, timely cleaning of the face, ice packs after the symptoms can be effectively relieved. 3. Cryptococcus dermatitis: contact dermatitis caused by skin contact with venom in the body of cryptococcus. After the body of cryptococcus stays on the skin, the strong acidic venom in the body of cryptococcus leads to the onset of the disease. A few hours to 2 days after contact with the venom, localized edematous erythema in the form of stripes, flakes or clusters of dots with dense papules, blisters, and pustules on top of them, with itching, burning pain, and a burning sensation. Sudden fiery pain in the face may also have other causes, it is recommended to consult a doctor in time to find out the cause and then actively treat it, so as not to delay the condition.