Brief Answer:
The discomfort in the kidney area, with certain movements, seems to be muscular-skeletal in nature

Detailed Answer:
Hello and welcome to "Ask a Doctor" service,

I carefully read your query.

Discomfort in the lower back with certain positions is very likely to be due to a muscular-skeletal condition (the muscles or the bones/joints in the area). Actually, over 90% of back pains are due to muscular-skeletal conditions as well. In your case, because of the relation of the pain with a specific movement, I think this is very likely what is happening in you as well. A good physical examination will be able to better clarify this.

As for the blood in the urine, it is recognized that strenuous exercise may cause blood in the urine and this is of unknown cause but is not dangerous and lasts only a few hours to a maximum of 3 days.
In your case, have you had urinalysis that has confirmed the presence of blood in the urine? Or you just notice darker urine than usual?

For exercise-related hematuria (blood in urine), strenuous exercise is needed so I would suggest that tests for other conditions should be done first to rule out structural diseases. An ultrasound examination is an easy test and readily available and will help visualize the kidneys and bladder.
Sometimes, other examinations may be needed such as cystoscopy (visualizing the bladder with a camera from inside) or a CT scan.

To conclude:
- the pain you describe is very likely due to the muscles and the bones/joints in the area. Paracetamol, ibuprofen, and physiotherapy are the recommended treatment for these.
- if you have not had a urinalysis but only noticed dark urine, a urinalysis is needed to confirm the presence of blood in the urine (hematuria)
- if the presence of blood in urine is confirmed with urinalysis, I would suggest examinations to rule out structural problems. This is because generally, exercise-related hematuria is a diagnosis of exclusion (is considered only after other diagnoses are ruled out) and also because strenuous exercise is needed for it to happen.
- an ultrasound is the first examination and it may be followed by cystoscopy or CT scan, in case your doctor thinks they are necessary.

I hope this answers your query.
I remain at your disposal in case further medical assistance is needed.

Regards,

Dr. Antoneta Zotaj,
General and Family Physician

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