Do you need a fixed number of applications?

Use dryness and exposure as your cues rather than trying to hit a daily total. Chapped lips need a nonirritating balm several times a day, while morning and bedtime applications give your routine two useful anchors. Keep balm handy so you can apply it at the first sign of dryness instead of waiting for cracks.12

Lip balm seals in existing moisture, which is less glamorous than the packaging usually has in mind. For very dry, cracked lips, use a thick ointment such as white petroleum jelly, especially before bed. Ointment seals in water longer than waxes or oils, making it useful when ordinary balm is not keeping your lips comfortable.23

How often should you reapply outdoors?

Apply a lip balm with broad spectrum protection and SPF 30 or higher before going outside, including in winter. Reapply every two hours and after eating, swimming, sweating or licking your lips. Sun protection follows an outdoor schedule, not just whether your lips feel dry. Cold air and wind also cause chapping; covering your mouth with a scarf adds protection in cold weather.34

What if you keep needing more balm?

Look at the formula before increasing the frequency. Menthol, phenol and salicylic acid can make lips drier, creating a cycle of irritation and more applications. Fragrance and added flavorings can also irritate lips or cause allergies. Choose a simple, fragrance free petroleum based product. Stop using any balm that burns, stings or tingles rather than treating discomfort as a sign that it is working.25

Lip balm does not make your lips stop producing natural moisture, and it is not physiologically addictive. Applying balm can become a comforting habit, giving a small tube a surprisingly large role in the day. Notice whether you are applying it to relieve dryness or simply out of habit. If your lips feel comfortable and you are not due for outdoor sunscreen reapplication, you can cut back on those automatic applications.5

What helps between applications?

Avoid licking, biting or picking your lips. Saliva makes lips drier as it evaporates, and picking interferes with healing. Skip lip scrubs, which remove the protective outer layer and can worsen dryness. A bedroom humidifier helps when indoor air is dry, particularly if you breathe through your mouth at night.25

Do cracked mouth corners need more balm?

Inflamed, cracked mouth corners can be angular cheilitis, a condition often caused by prolonged saliva exposure. Frequent lip balm or thick ointment is often enough when saliva is the cause, but other causes need different treatment. Oral retinoid medicines such as isotretinoin can cause dry lips. Persistent painful cracks, oozing or crusting deserve assessment rather than simply more balm.6

How long should healing take?

Regular balm use should ease discomfort while your lips heal. Expect noticeable improvement within two to three weeks; severely cracked or bleeding lips can take that long to recover fully. See a healthcare provider if your lips get worse, bleeding is frequent, or care at home does not help. Persistent chapping can have causes other than dry weather, including an allergy or infection.123

If you have had a cold sore, throw away any lip balm that touched it while it was healing. Do not share balm that has touched someone else's cold sore.4

Where this answer comes from

  1. 1Chapped Lips (Cheilitis): Causes, Treatment & Preventionmy.clevelandclinic.org
  2. 27 dermatologists' tips for healing dry, chapped lipsaad.org
  3. 3How To Get Rid of Chapped Lips: 6 Remedieshealth.clevelandclinic.org
  4. 4Cold sore remedies dermatologists recommendaad.org
  5. 5Is Chapstick Bad for You?health.clevelandclinic.org
  6. 6Angular Cheilitis: Symptoms, Causes, and Management with Imagesdermnetnz.org