Red and swollen dog paws may be caused by trauma, mosquito bites, fungal and bacterial infections, etc. First, you need to check whether the dog is in pain. If there is pain, it may be caused by injuries. It is best to take the dog to the Check at the pet hospital; if there is no pain, it may be caused by a skin disease. The dog needs to be dewormed externally, and the paws must be cleaned carefully. It will usually get better in a few days.