How long it takes for seborrheic dermatitis to heal on the face is determined by the type of seborrheic dermatitis. Usually, infantile seborrheic dermatitis is cured within 3 months after treatment. For adult seborrheic dermatitis, treatment with antibacterial and anti-inflammatory medication can take about 2 weeks to heal, while for longer duration of the disease, failure to seek medical attention may take 1-2 months to heal. However, adult seborrheic dermatitis is mostly chronic and can have recurrent episodes. The recovery time for facial seborrheic dermatitis is also affected by lifestyle, diet and the patient’s own immunity, so the recovery time for facial seborrheic dermatitis cannot be generalized. In addition, if the patient has itching symptoms, you can take oral B vitamins to relieve, if the itching is more serious, you can also consider the use of hormone-containing ointment treatment as prescribed by the doctor.