The reasons why dogs always shake their heads:

1. There is foreign matter or dirt in the dog’s ears and he wants to get rid of it by shaking his head. The owner needs to check whether there is anything in the dog's ears. If any foreign body is found, it needs to be removed in time. If it is difficult to remove, you need to seek medical treatment in time.

2. Dogs may have ear mites parasitic in the ear canal, causing the dog’s ears to be itchy. Dogs infected with ear mites will have dark shell-like debris in their ears, which requires the owner to remove Apply medicine promptly.

3. Bacteria infection in the dog’s ears can also cause discomfort in the dog’s ears. Generally, the ears feel hot to the touch. The dog may scratch its ears while shaking its head, and the ear canal may also be found. Redness, bad odor, and brown discharge are symptoms most commonly associated with yeast and bacterial infections.

4. It may be that the breeder failed to dry the water on the dog's body and ears in time after bathing the dog. At this time, the dog shakes his head to dry his body.

5. This abnormal behavior of dogs may also be caused by nerve damage, common drug side effects, head tumors, poisoning, etc., or it may be genetic diseases. The owner finds that the dog is acting like this. Any abnormality should be treated promptly to prevent deterioration.