Skin itchiness is a very common complaint in dogs.
There are several conditions that can lead to skin itchiness like skin allergy, skin infection, parasites. Even some metabolic disorders like liver diseases or some forms of tumours can produce skin itchiness.
Many dogs can inflict self-trauma by scratching, biting or rubbing the skin so it is important to act quickly. In most of cases, veterinarian attention is needed to address the problem and provide treatment.