Herpes zoster is caused by a varicella-zoster virus infection and can grow on any part of the body, from head to toe, and on the arms. Herpes zoster in this area is caused by the herpes zoster virus invading the nerves of the upper limbs, and tends to appear unilaterally, with clustered blisters on one side of the arm, usually in a banded or striped pattern. The blisters may be large or small, some may even appear some pustules or blood blisters, and often accompanied by some obvious neuralgia, that is, the arm will feel very painful, and when the pain is severe, it can affect the rest, and can not sleep at night, can not turn over. In addition, some patients do not have obvious pain, but the itching is very obvious, and there is numbness, no feeling, weakness of the symptoms, in lifting things can not lift, no feeling at all, and even when eating even chopsticks can not pick up, the above that is the main manifestations of herpes zoster on the upper limbs.