Patients experience chest pain but the pain gets better when they lie down and rest. Patients with coronary artery stenosis have insufficient blood supply to the heart muscle. Patients with coronary artery stenosis may suffer from myocardial ischemia during strenuous activities or emotional excitement, which may lead to chest pain. When lying down and resting, the pain may be relieved. In addition to the symptoms of chest pain, there is also the possibility of having costochondritis. Patients with non-specific costochondritis may experience pain in the area of the internal cartilage. The pain may increase with vigorous activity, deep breathing, or coughing, and is often relieved when lying down at rest. In addition, this condition may be caused by muscle strain. If the intercostal muscle is strained during strenuous exercise, it can cause pain in the intercostal muscle, resulting in chest pain. The pain may also get better when the patient lies down to rest due to reduced activity. In addition, oral anti-inflammatory and analgesic drugs can be used for symptomatic treatment, and further examination is needed to clarify the diagnosis if it is accompanied by other symptoms.