Allergies cause swelling of the face, need to remove the allergens in time, should go to the dermatology department of the hospital in time, and follow the doctor’s instructions to reduce swelling and anti-allergy treatment. Allergies cause face swelling, may be the use of certain cosmetics or consumption of certain foods, may also appear itching, pimples and other symptoms. Should immediately stop contacting the allergy-causing substances, such as cosmetic-induced face swelling, need to wash the face with water to remove the residual substances, and promptly consult a doctor, the main clinical treatments include medication, other treatments and so on. Patients with allergy-induced face swelling can take antihistamine drugs such as loratadine and phenylephrine orally as prescribed by the doctor. If the symptoms of face redness and swelling are more serious, glucocorticoid drugs such as beclomethasone dipropionate and budesonide aerosol can be used. For patients with severe allergic reactions, they can also be treated with epinephrine, which can relieve symptoms such as redness, swelling and itching of the face. Once an allergy to a substance or food is detected, contact should be avoided in daily life so as not to cause another allergic reaction. If the cause of the allergy is not clear, allergen testing is also required. Patients with allergic face swelling should consult a doctor for guidance and treatment, and avoid self-medication.