This may result from violent exertion, over-lifting, or other cause. Have the patient lie on his back, with a pillow or pad under his hips, and thigh drawn toward the body. Tell him to breathe evenly and naturally. Gently press the neck of the hernia back in line with the middle of the canal through which it has descended. If it does not return after a little manipulation, apply cold cloths for an hour, then try again. Do not persevere long enough to set up inflammation. If successful, cover with a pad tightly bandaged over the groin. If not, keep the patient on his back until medical help arrives.