Skin & hair blog  /  Dry lips

Dry Lips: Why Your Lips Keep Cracking and How to Heal Them

Dr Saira Mohsin  •  Updated 12 October 2026
Originally published 10 June 2023

Do your lips feel tight again soon after applying balm? Dry lips can make a smile, a meal or your usual lipstick uncomfortable. A simpler routine—and understanding what keeps irritating them—is a useful place to start.

In this guide: Causes  •  Daily care  •  When to seek help  •  FAQs

Why do lips become dry and cracked?

Lip skin is delicate and lacks the oil glands that help protect much of the rest of your skin. Chapping may cause roughness, flakes, tightness, itching or small painful cracks. Inflammation of the lips is called cheilitis. [2]

• Weather and exposure: wind, dry air and sun can contribute.
• Repeated irritation: licking, biting or picking can keep the surface sore.
• Dehydration: inadequate fluid intake may play a part, but persistent dryness has other possible causes.
• Medicines or skin conditions: eczema and medicines such as oral retinoids can be involved. Discuss prescription side effects with your prescriber.

These triggers can overlap. A history of when the problem began often matters more than choosing another lip product.

Could your lip balm or toothpaste be the trigger?

Allergic contact cheilitis can cause itchy, burning, scaly or cracked lips. Lip cosmetics, toothpaste, flavourings, fragrances and preservatives are possible triggers. A dermatologist may recommend patch testing, including your own products. Treatment centres on identifying and avoiding the relevant allergen; simply changing brands may not remove it.

A gentle routine for dry lips

1. Keep the formula simple. Plain white petroleum jelly is an option for very dry lips. Apply a comfortable, non-irritating balm or ointment several times daily and before sleep.
2. Protect outdoors. Choose a lip product with SPF 30 or higher; zinc oxide or titanium dioxide are options. Reapply every two hours outside and after it wears off.
3. Pause irritating products. Stop products that sting or burn. Avoid menthol, camphor and fragranced or strongly flavoured balms while your lips are chapped.
4. Break the licking habit. Reach for balm instead. Leave loose skin alone; do not scrub cracked lips with sugar or a toothbrush.

These measures follow general dermatology advice for chapping. A bedroom humidifier may also help when indoor air is dry.

Wash your hands before applying balm from a pot, keep your own lip products and avoid sharing them. Drink enough to avoid dehydration. In cold, windy weather, a scarf can provide additional protection.

What if the corners of your mouth keep splitting?

Cracks concentrated at the mouth corners may be angular cheilitis. Saliva collecting in the folds can irritate the skin; yeast or bacteria may also be involved. Denture fit, some medicines and nutritional deficiencies can contribute in some people.

Recurring, painful or crusted corners deserve assessment. Treatment depends on the cause and may involve barrier care or a prescribed medicine. Do not assume that every corner crack needs an antifungal, antibiotic or steroid cream.

When should you see a dermatologist?

Arrange a consultation if careful home treatment has not helped within two to three weeks, or if dryness repeatedly returns. Persistent scaling may need assessment for causes beyond ordinary chapping, including sun damage.

Seek advice sooner for lips that are hot, painful and swollen, because infection is possible. A small fluid-filled blister, especially after tingling or burning, may be a cold sore rather than simple dryness.

Bring the balms, lipsticks and oral-care products you use, along with your medicine list. Note any recent product changes, how long symptoms last and whether the corners or the whole lip are affected.

Frequently asked questions

Is petroleum jelly useful for dry lips?

Yes. It helps form a protective barrier. It does not provide sun protection unless the product is specifically labelled with an SPF.

Why are my lips still dry even though I drink water?

Fluid intake is only one factor. Irritation, weather, eczema, allergy or a medicine may be responsible. Repeated symptoms need a closer look at the cause.

Does dry skin around the mouth mean I need vitamins?

Not necessarily. Deficiencies can contribute to angular cheilitis in some cases, but the appearance alone cannot establish a deficiency. A clinician can decide whether investigation is appropriate.

Can I become allergic to a lip product?

Yes. Allergy can resemble persistent chapping. Keep the packaging and ingredient list of a suspected product for your consultation; patch testing may help identify the trigger.