The organs located in the lower left chest are the stomach and spleen. When the stomach is moderately full, most of it is usually located in the left quaternary rib area, and a small portion is located in the supra-abdominal area, and the reasons for the large variations in its location include body size, body position, and different levels of filling. The stomach is the most expanded part of the digestive system, with a capacity of about 1500mL in adults. In addition to holding food and secreting digestive juices, the stomach also has endocrine functions, etc. The spleen is located between the stomach and the diaphragm. The spleen is located between the stomach and the diaphragm, on the inner surface of the 9th to 11th ribs, with its long axis aligned with the 10th rib. The position of the spleen is not fixed, and will move slightly with respiratory movements and changes in body position, and is 2.5cm higher when lying down than when standing up. the spleen is the largest lymphatic organ in the body, and its functions include blood storage, hematopoiesis, and removal of senescent red blood cells. If you have any discomfort in the lower left side of the chest, it is recommended that you consult a doctor in time to avoid delaying your condition.