Severe angular cheilitis

Concerning changes include fissures that repeatedly bleed, substantial swelling, pus, spreading crust or pain that interferes with eating and drinking.

Extensive damage may follow ongoing saliva exposure and friction, secondary yeast or bacterial growth, a strong irritant reaction, or more than one factor. A clinician also needs to exclude cold sores, contact dermatitis and other lip or mouth conditions that can resemble angular cheilitis.

Repeated or difficult-to-heal episodes may prompt review of dentures or bite, dry mouth, skin disease, medicines, nutrition and health conditions that affect healing or infection risk.

Keep the corners clean, pat rather than rub, and use a bland fragrance-free barrier if it does not worsen discomfort. Sip fluids and choose soft, non-stinging foods if opening the mouth is difficult. Leave crusts and blisters intact.

Do not delay assessment while cycling through antifungal, antibiotic and steroid creams. Severe inflammation may need a diagnosis-specific plan, and some medicines can aggravate an infection or trigger further irritation.

Seek same-day medical advice for rapidly worsening pain, expanding redness, significant swelling, discharge, fever, or inability to eat and drink adequately. People with reduced immunity or poorly healing skin should arrange prompt review rather than relying on self-care.

Call for emergency help if facial or mouth swelling makes breathing or swallowing difficult, or if you become confused, faint or severely unwell. These are escalation signs regardless of whether the original crack seemed minor.

Tell the clinician how quickly the area changed, whether fluid intake is affected, which products were applied and whether episodes recur. Ask what diagnosis is being treated, how to use each medicine and which change should trigger reassessment.