After doing laser throat surgery usually does not appear red urine, it is recommended that patients had better go to the regular hospital to check first, red urine is commonly a symptomatic manifestation of urinary system diseases. Red urine may be the cause of blood in the urine, if it is the bladder and prostate surgery, it may be the cause of local oozing after surgery. However, surgeries on other parts of the body usually do not produce occult blood in the urine, so red urine is not usually seen after laser throat surgery. Red urine is commonly associated with hematuria of the naked eye, which refers to the presence of blood in the urine, which can be red to the naked eye or the color of washed flesh and water. The more common cause of hematuria is urinary system diseases, such as urinary system infections, stones, tumors, malformations or glomerular lesions; if there is a urinary system disease may be accompanied by frequent urination, urinary urgency, urinary pain, lumbago and other symptoms. This symptom alone is not enough to diagnose the disease, when eating food containing red pigment or special drugs, may also appear red urine. Therefore, when the patient appears to have red urine, should consult a doctor in time to clarify the cause, and take active treatment.