Aloe vera is generally not recommended for patients to apply directly on their face. Facial skin is often relatively tender and thin. If you apply aloe vera directly, it may be more irritating to the skin due to its higher concentration.
If the patient's skin is sensitive, external application may lead to obvious contact dermatitis. If the patient has acne, skin ulcers, etc. on the face, it may cause obvious irritation to this area, causing obvious pain, and may also cause secondary infection.