Morning urine is red, and this condition is not normal. Normal adult urine is usually light yellow or white. Red urine usually indicates the presence of hematuria. Clinically, there are many causes of hematuria. Generally, painless carnal hematuria is common in elderly people with urinary tumors, such as kidney tumors, bladder tumors, ureteral tumors and so on. If hematuria is accompanied by frequent, urgent and painful urination, it usually indicates the presence of acute urinary tract infection. If hematuria is accompanied by symptoms of back pain, there may be diseases such as urinary stones. Other common causes of hematuria include urinary tuberculosis, urinary system injury, chronic nephritis, nephrotic syndrome, etc.