Urine color red and urine thick, it is recommended to go to the hospital for relevant examination to clarify the possible causes.1, acute urinary tract infection, such as acute cystitis, acute urethritis and other diseases, can cause urethral mucosal congestion and edema, which will cause the phenomenon of reddish urination, and because of the infection of the urine after the presence of more leukocytes, pus cells, so the patient will be the phenomenon of urine thick. It is recommended to carry out further urine culture and anti-infection treatment as soon as possible after the diagnosis is confirmed.2. Tumor of the urinary system, tumor necrosis itself can cause bleeding or the tumor can cause mucous membrane ulceration and bleeding, which can cause the urine color to be reddish. Tumor necrosis with increased epithelial shedding can cause the urine to be thick, and at the same time, flocculent or feathery debris can be seen to be discharged from the body, and even part of the small blood clot can be seen to be discharged from the body. Early stage is not accompanied by obvious pain, it is recommended to carry out ultrasound, CT or cystoscopy of the urinary system to further exclude the presence of tumor lesions.