SYMPTOM
Crusty lesions on ear tips
Owners may observe crusty lesions on ear tips in their pet.
Various conditions
This symptom can occur in multiple conditions and warrants further assessment.
Why timing matters
Early observation
Early recognition allows prompt assessment and intervention if needed.
Later presentation
Persistent or worsening signs may indicate progression requiring attention.
The significance of this symptom depends on its context, duration, and associated findings.
Conditions commonly associated
Squamous Cell Carcinoma
Scabby, crusty areas on the ear margins of white cats are characteristic early signs.
Squamous Cell Carcinoma
Squamous cell carcinoma in cats often develops on the ear tips of white-coated individuals following chronic sun damage, with crusty, non-healing lesions representing the transition from precancerous change to invasive cancer. The crusting reflects ongoing tissue destruction and abnormal keratinocyte behaviour in sun-exposed areas.
Atopic Dermatitis in Dogs
Atopic dermatitis in dogs can cause crusty lesions on the ear tips when chronic inflammation and self-trauma from scratching damage the skin, with the ear margins being particularly vulnerable to environmental allergen contact and secondary bacterial colonisation.
Pemphigus
Pemphigus foliaceus often affects the ear tips in dogs and cats, where autoimmune attack on the connections between skin cells leads to characteristic crusting and scaling. The ear margins tend to be early and prominent sites for lesion development in this autoimmune skin condition.
Alabama Rot (CRGV)
Alabama rot can present with crusty skin lesions on the extremities, including the ear tips, as part of the cutaneous vasculopathy that characterises this condition. These lesions reflect damage to small blood vessels in the skin before potential progression to kidney involvement.
When to explore further
When the symptom is persistent or worsening
When other signs are present alongside
When daily activities or quality of life are affected
When there is uncertainty about the cause
Noting when this symptom occurs, any triggers, and how it changes over time can provide useful information for veterinary discussions.
Last reviewed: 24 April 2026 · Dr Alastair Greenway MRCVS