The lower right side of the breast is the location of the lower right lung and liver and gallbladder. If there is pain or other abnormalities in this area, consider lung disease or disease of the hepatobiliary system. When right lower pneumonia or pleurisy or pleural effusion occurs, the patient will have pain in the lower right side of the breast. This pain is breathing-related pain, which is aggravated by deep inspiration, coughing and turning the position, and diminished or disappeared when holding the breath, and may also be accompanied by coughing, coughing up sputum, fever and shortness of breath, etc. A chest X-ray or lung CT examination is recommended to clarify the diagnosis. Patients with cholecystitis, gallbladder stones, hepatitis, liver cancer and other diseases may experience pain and discomfort in the lower right side of the breast or upper right abdomen, and may be accompanied by nausea, vomiting, aversion to oil and grease, yellowing of the skin, and bitterness in the mouth, etc. It is recommended to do ultrasound of the liver, gallbladder, spleen and pancreas and liver function examination to clarify the diagnosis.