Skin itchness is a quite common discomfort in dogs.There are several condition that can cause skin itchiness like skin allergy, skin infection, parasites or other skin disease. And some metabolic disorders such as liver diseases or some forms of tumours can cause skin itchiness, too.
Many dogs can inflict itself-injury by scratching, biting or rubbing the skin, so it is important to take action in time. If it is less severe, you can just use the medicine for expelling parasite. If your dog keeps scratching itself even after using medicine, veterinarian attention is needed to solve the problem and provide treatment.