The hard back of the cat's neck may be caused by factors such as incomplete absorption of vaccines and skin diseases. It may be that after the cat is injected with the vaccine, the vaccine is not completely absorbed, and a hard lump is formed on the skin. At this time, the owner can apply hot compress to help the hard lump to dissipate.

Maybe it is The cat is infected with fungi, mites and other pathogens. The skin and hair on the affected area will fall off, with ring-shaped spots like the size of a coin. Sometimes the affected area will become bald or in severe cases, erythema or crusts will form. When the cat feels itchy From time to time, the affected area will be constantly scratched, and the skin will become red, swollen and eroded, which will spread to the whole body over time, which is quite troublesome to treat. The owner can take the cat to a nearby hospital to check the diagnosis and take medicine for treatment.