There is something like blood scab on the dog's head, which may be caused by head injury, skin disease, etc. If a dog suffers a head injury and a scab is formed by blood coagulation in the wound, it is recommended that the owner check the wound for redness, swelling and infection. If necessary, squeeze out all the pus, clean and disinfect it and then apply antibacterial and anti-inflammatory drugs.

If a dog is infected with parasites or fungi, the skin will experience severe itching. The dog's scratching will cause skin damage. It is recommended that in addition to treating the damaged skin, external deworming or antifungal drugs are also required.