Hereditary nasal parakeratosis (HNPK) is a condition where affected dogs develop crusts and fissuring of the nose pad at a young age but are otherwise healthy. In severe cases painful fissures will appear. Also known as Hyperkeratosis it is inherited as a monogenic autosomal recessive skin disease. HNPK currently cannot be cured, but the symptoms can be alleviated with symptomatic therapy.