Cold sores are red bumps that eventually become open wounds on the outer lip area and sometimes the cheek or inside the nose. The American Academy of Dermatology says that the herpes simplex virus type one is the most likely cause of cold sores, sometimes called fever blisters. Women who are pregnant with cold sores may be able to use prescription medications when recommended by a medical-care provider. Home treatment and over-the-counter products may be lower in risk but should still be approved by a health-care provider for use in pregnancy.
Wash the affected area with warm water and a soft cloth. Soaps or facial cleansers should be avoided because they can irritate the cold sore and sensitive skin.
Pat the skin dry in preparation for treatment.
Wet a cotton swab or cotton ball with a small amount of witch hazel. MotherNature.com says that this natural solution is an astringent, a solution capable of drying up a cold sore. The witch hazel can reduce irritation, itching and speed healing time.
Repeat the steps beginning with washing the affected skin between one and three times per day. This can be continued until the sores heal.