Tingling and numbness of the arm, consider cervical spondylosis, multiple peripheral neuritis, frozen shoulder. 1. Cervical spondylosis: cervical spondylotic hyperplasia, herniated intervertebral discs can radiate to tingling and numbness in the arm, and severe patients will have muscle atrophy and grip weakness. 2. Multiple peripheral neuritis: mostly seen in metabolic diseases, alcoholism, drug intoxication and other reasons, tingling and numbness in the distal limbs. 3. Frozen shoulder: adhesions occurring in the muscles, fascia, and joint capsule around the shoulder joint can cause limited shoulder joint activity and can involve tingling in the arm. So arm tingling and numbness if rest does not reduce the need to go to the hospital to check the cause of clear treatment.