Dog has a hard knot on its back

Dog has a hard knot on its back: This could be a vaccination nodule caused by the incomplete absorption of the vaccine. This situation usually occurs after the dog receives a vaccination. The owner is advised to use a warm wet towel for hot compression. In addition, if the dog has not had a vaccination recently, it is also possible that the knot is caused by a cyst or lipoma growing on the dog's back. The owner can observe whether the knot is continuing to grow. If it is getting bigger, it is recommended to take the dog to the pet hospital in a timely manner to check if surgery is needed.

Vaccine absorption: If the hard knot on the dog's back appeared after vaccination, it may be due to incomplete absorption of the drug. In this case, the owner can use a warm towel to compress the knot or massage it to promote drug absorption. If the drug is fully absorbed, the knot will disappear.
Tumors: If the hard knot on the dog's back has been there for a while, and grows larger over time, and the dog also shows symptoms of pain, it is likely a tumor. In this case, the owner is advised to take the dog to the pet hospital as soon as possible for X-rays to determine if it is a benign or malignant tumor and whether surgery is an option.
Sebaceous cysts: When a dog's hair follicles and pores are blocked, the skin becomes inflamed and small knots form. These cysts, unless they are very large, generally pose no harm to the dog. If treatment is desired, the dog can be given oral antibiotics and topical ointments.