There is no hidden reason or mystery regarding why dogs like the area at the base of their tails scratched. They do for the same reasons you like having your back scratched: It feels good, and it generally is difficult to reach that area to scratch it.
Dogs often indicate that they want to scratch the base of their tails in quite literal ways, shift their back to you or shake their back from side to side. If your pet is looking for some affection shaking the tail, you may have wondered why the scratches feel so good.
Most dogs have difficulty reaching the base of their tail to scratch themselves. It can be similar to the way you might need a friend to scratch the hard-to-reach areas of your back when itching appears. Some dogs may seek to scratch the base of the tail to calm the itch they cannot reach.
Dogs evolved as social creatures – and for many, humans took the place of their dogs’ packaging. Touch was one of the main ways in which dog groups communicate, and dogs still strive to communicate in this manner. For many dogs, abdominal massages and buttocks scratch convey affection and love. In fact, spanking scratches are one of the most enjoyable areas for dogs, along with the abdomen and the underside of the chin and chest.
A lot of good things can be a cause for concern. Your dog may suffer from allergies, skin infections, fleas, mites, or other lesions that cause him to search for tremors. If your dog searches for scratches several times a day or excessively scratches himself in other areas, make an appointment with your vet to make sure there are no underlying health concerns.
Not all dogs enjoy spanking scratches. For some, the pressure near your hips can be painful. If your dog turns away from you or tries when you try to touch the area, do not keep trying to scratch the back. When rubbing this area, avoid pulling the tail as this may cause pain as well.