Two months after renal contusion the left kidney is still large, which may or may not be normal. It is necessary to distinguish between physiological factors and pathological conditions. Physiological situation, the left kidney is larger than the right kidney, which is normal; if it is a pathological situation, it is not normal, and hydrocele, hemorrhage and other possibilities are considered. In case of renal contusion for two months, the kidney can usually return to normal. As the left kidney is larger than the right kidney in physiological situation, it is normal if it is physiological situation. If the left kidney is bigger than the right one due to pathological condition, it is considered that the left kidney may be edema caused by kidney stone or still have bleeding which leads to kidney enlargement. It is recommended to cooperate with professional doctors to improve the relevant examination as soon as possible, such as urinary system ultrasound, urine routine and renal function and so on. If the left kidney edema caused by kidney stones, should actively cooperate with the doctor for stone treatment and diuretic treatment, such as stone pellets, furosemide tablets, etc., combined with anti-inflammatory treatment, such as ceftriaxone sodium, amoxicillin, etc.; if bleeding caused by the need to comply with the medical advice of hemostasis (such as injectable thrombin), and, if necessary, surgical treatment, so as to improve the situation of the left kidney enlarged. Kidney contusion two months left kidney is still large, it is recommended that the regular hospital, improve the relevant examination, follow the doctor’s instructions for treatment.