The main reasons for pimples and hair loss on dogs:

1. Insufficient nutrition. A single dog food cannot meet the nutrients needed for the dog's skin and hair. Just like people, malnutrition will soon cause some health problems, and the dog's performance is a large amount of hair loss.

2. Bathing too often. Do not bathe your dog frequently. Bathing once every two or three weeks in winter is enough, and once every one or two weeks in summer is enough.

3. Wrong bathing method. If your dog uses human bath products for a long time, the skin will become itchy and dry, and if you scratch the skin all the time, it will cause a lot of hair loss or localized hair loss.

4. Caused by skin diseases and parasites. If your dog has severe non-seasonal hair loss, large patches of hair loss, accompanied by itching, small red rashes, pimples, etc., it is very likely that he has a skin disease or is infected with parasites.

Symptoms of skin disease infection in dogs:

1. Fungal infection in dogs will cause dandruff, hair loss, red skin and red blisters or papules. Symptoms, in severe cases the skin will begin to ulcerate.

2. Parasitic infections can be spread from dog to dog. Infected dogs will feel itchy and scratch constantly, leading to skin damage, alopecia areata and inflammation, usually on the face, ears or legs. The infection begins in the body and can easily spread throughout the body.

3. Bacterial dermatitis will recur, and dogs will develop scaling, scabs, and circular alopecia areata.

4. Eczema may appear in many places on the dog’s body, mostly on the head, chest or buttocks. It manifests as redness, swelling, fever, and raised small bumps on the surface of the dog’s skin. As the condition progresses, The development can appear in papule stage, vesicle stage, and pustule stage.