Certain skin problems, such as dermatitis and allergies, can cause pink spots on dog lips. Canine atopic dermatitis is an inherited condition in which dogs develop certain allergy symptoms after repeated exposure to some harmless materials. One of its symptoms includes skin depigmentation around the lips.

Pigment changes are normal and can be caused by the growth hormone and many other underlying causes. Do Dogs Smile? Fido’s lips are precisely adapted for gripping, manipulating, and consuming all kinds of nourishment. Creating Suction for Drinking Most papillomas disappear on their own and become less frequent as the dog’s immune system matures. However, very severe cases can occur with those that are immunocompromised due to other diseases, such as lymphoma, making it hard to fight off the viral infection.

Dogs can have a mouth ulcer that affects the skin of the lips outside the mouth or the mucosa inside the oral cavity. In addition to location, a dog mouth ulcer (aka “dog canker sore”) can vary in depth of the affected tissue. What Causes Dogs to Get Sores (Ulcers) in and Around Their Mouths?

Excessive salivation due to gingivitis (swollen gums) and tooth loosening can lead to pink spots on the lips. These occurrences are commonplace in dogs who have reached the age of three. As plaque builds up, the chances of such infections increase manifold. If a dog is diagnosed with a white wart or skin tag, these are generally left well alone. Warts should resolve over time, while skin tags should continue to grow very slowly, not troubling the pet. Other things your dog might do to get your attention are jumping up, pawing, barking, dropping things in front of you, nipping at you, or stealing things to make you chase them. You can train your dog to avoid these behaviours by rewarding good behaviours like being calm and sitting nicely. 7. Your Dog Has A Salivary Gland Problem

Papillomas, also known as dog warts, are small growths caused by a viral infection that grows outwards and have a lumpy surface, often resembling small cauliflowers. But dogs don’t smile at each other this way. Dogs do use their lips in multiple facial expressions, but not like humans. For example, if your dog is very excited, his lower lip may be quivering. But if he is curling his lip at another dog, he may be signaling the other dog that he wants to be left alone. The reason for the dark coloration of a dog's lips has to do with the presence of melanin, a pigment that gives color to skin, hair, and other parts of the body. Melanin is produced by special cells called melanocytes, which are found in the skin and other tissues, including the lips. Discharge or Odor: If your dog’s lips produce discharge or emit an unpleasant odor, it could indicate an infection. Discharge may be yellow, green, or brown and could be a sign of an underlying condition that requires medical attention.