Weakness and pain. Often patients complain of pain in the chest or back, which persists with time. The pain may be in the chest or lung area, but it can also be present in the upper back, shoulders or neck – and it is easily confused with muscle pain. The pain can be different: from periodic to acute paroxysmal and permanent. Pain can be delivered to the shoulder, neck, stomach. Also, pain can intensify with deep breathing, coughing. Pain is not stopped by taking non-narcotic painkillers. By the intensity of pain can be judged on the extent of affection to the lungs and other organs of the chest.