Red, swollen and pustules on the dog's feet may be caused by interdigital inflammation, injury, etc. Owners should pay attention to check the condition of the dog's feet. If it is a traumatic wound, you can use iodophor to wipe the local disinfection and then send it to the hospital. The dog should go to the pet hospital for examination and treatment. If it has interdigital inflammation, seek medical attention promptly. Pay attention to the hygiene of the dog's feet. Try not to take the dog to play in woods and grass to reduce bacterial infection.