The possible causes of frequent urination and red, blood-coloured urine are as follows.
Infections of the urinary tract, such as cystitis and urethritis, can occur with blood in the urine. Patients are often accompanied by symptoms of frequent urination, urgency and painful urination. At this time, it is recommended that a laboratory test of urine be carried out in hospital to further clarify the presence of infection.
The presence of stones in the urinary system, such as those in the ureter, kidney and bladder, can cause there to be localised mucosal rupture and bleeding, which can result in blood or blood in the urine.
Tumours or polyps in the urinary tract can also cause bleeding from the tumour or polyp or bleeding from the local mucous membrane, which can then form blood in the urine, blood clots or a noticeable reddish colour of the urine, at which point it is recommended to go to hospital for an ultrasound to clarify.