Some dog hair loss is caused by humans. Bathing the dog frequently or washing it too frequently destroys the protective cortex of the dog's own skin, causing the dog to shed hair. Let your dog eat some leftovers and consume too much salt, which will also cause your dog to lose hair. Therefore, you need to change the feeding, don’t let the dog eat anything too salty, comb the dog’s fur regularly, and bathe the dog regularly.
Care Hacks
The dog has a bald patch of hair on his body

A bald patch of hair on a dog may be caused by injury, skin disease, etc. If a dog's skin is injured and the hair follicles are damaged or necrotic, baldness will occur. This situation is generally irreversible unless the hair follicles are restored. If your dog is infected with fungi or bacteria, the above symptoms will also appear, accompanied by itching, redness and swelling. Timely treatment is recommended.