There are many causes of cough without sputum and pain in the lower part of the lungs. If it is caused by bronchitis, it can be relieved by taking drugs (such as azithromycin tablets, dextromethorphan, etc.); if it is caused by viral pneumonia, it can be treated by taking drugs (such as ribavirin, etc.); and if it is caused by tuberculosis, it can be treated by taking anti-tuberculosis drugs (such as isoniazid, etc.). Specific cases need to be analyzed. 1. Bronchitis: Mycoplasma infections caused by bronchitis typical symptoms of dry cough, coughing frequently and violently can cause pain in the lower part of the lungs, you can take azithromycin and other anti-infective treatment, and at the same time take dextromethorphan to suppress coughing. Dextromethorphan has a hypnotic effect, after taking the need to avoid engaging in high-altitude work and other dangerous work. 2. Viral Pneumonia: Viral pneumonia can be characterized by a dry cough, and if the inflammation involves the pleura, there can be symptoms of pain in the lower part of the lungs. Generally, ribavirin can be used for anti-viral treatment. During the treatment period, you need to pay attention to rest, regular work and rest, and eat more high-protein, light food to enhance the immunity of the body. 3. Tuberculosis: Tuberculosis often manifests itself in the form of an irritating dry cough, which may involve the pleura, leading to pleurisy and chest pain. It can be treated with anti-tuberculosis drugs, such as isoniazid, rifampicin and pyrazinamide. The symptoms of cough without sputum and pain in the lower part of the lungs can also be caused by other diseases. If the symptoms are not relieved, or if they tend to worsen gradually, it is necessary to consult a doctor in time to make a clear diagnosis, and to treat the cause of the disease.