Hidden pain in the left groin may be related to enlarged inguinal lymph nodes, or it may be caused by inguinal hernia, hip arthritis and other reasons. 1. Enlarged inguinal lymph nodes: It is mostly considered that it may be caused by soft tissue infection around the hip joint, or it may be caused by metastasis of malignant tumors in the rectum, anus or lower abdomen. When the inguinal lymph nodes are enlarged, a vague pain in the left groin may appear. 2. Inguinal hernia: Left inguinal hernia is usually caused by age-related thinning of the abdominal wall, congenital weakness or defect of the abdominal wall. Inguinal hernia can lead to vague pain in the left groin, but also with a prominent lump in the groin, abdominal distension, swelling feeling and other manifestations. 3. Hip arthritis: due to the presence of inflammation in the hip joint area, under the stimulation of inflammation, can lead to hip joint pain, resulting in the left groin radiating hidden pain, may also be accompanied by hip joint stiffness, swelling and other symptoms. Hidden pain in the left groin may also be caused by other reasons, it is recommended to consult a doctor as soon as possible, after a clear diagnosis of the causative factors, to give targeted treatment and adjustment.