The sensation of numbness in shingles is mainly due to the involvement of nerves. Herpes zoster is caused by varicella-zoster virus infection, this virus generally lurks inside the posterior root ganglion of the spinal cord or cranial nerve sensory ganglion, when the body’s immunity is low, the virus will replicate to cause symptoms, herpes zoster is generally along the nerve axon downstream to reach the area of the nerve innervated by the skin within the replication, and at the same time, make the involvement of the nerve to occur in the inflammation and necrosis, which produces an abnormal sensation of the skin, such as numbness, pain, etc. Herpes zoster with numbness sensation is usually caused by nerve inflammation, you should communicate with your doctor in time, keep observing your body condition, and actively cooperate with the treatment. In addition, this virus has a certain degree of contagious, in the treatment period should pay attention to isolation, to avoid infecting other people, it is recommended not to touch and scratch the rash, to avoid spreading the virus and cause skin infections.