It is normal for dogs to have red hair loss on their front legs and elbows

Red hair loss on dog front legs and elbows is related to the dog’s posture, because dogs like to lie down and their front elbows will rub against the ground. It's normal. As dogs age, the skin on their elbows will thicken, become shiny, and become bald. To eliminate the causes of skin diseases, owners can usually give their dogs some lecithin to help them beautify their coats. Do not let your dog lie on rough ground.

The hair loss and redness on the dog’s front legs and elbows is caused by skin disease

If you need to confirm the cause, you need to go to the pet hospital to do a skin scraping fungus test and give the dog symptomatic treatment in time. .