Inguinal swelling may be caused by extra-abdominal hernia, skin mass, enlarged lymph nodes and so on. 1. Extra-abdominal hernia: An extra-abdominal hernia, commonly known as a hernia, is usually caused by a decrease in the strength of the abdominal wall and an increase in abdominal pressure. Symptoms such as constipation, vomiting, and difficulty urinating may occur, and there may be a lump in the abdomen when standing. 2. Skin lumps: inguinal lumps may be skin lumps, that is, superficial skin diseases such as folliculitis, sebaceous cysts, etc., which may be caused by allergies, lack of hygiene and other reasons. 3. Enlarged lymph nodes: groin swelling may also be caused by enlarged lymph nodes, which may be caused by bacterial, fungal, viral infections or malignant tumors, usually found in the groin with lumps, tenderness and other manifestations. It is recommended that patients find groin swelling timely go to the hospital for examination, under the guidance of the doctor to identify the cause of the disease to be treated accordingly.