toxins
An imbalance of electrolytes causes problems with spasms.
mostly stress
What causes spasms in the front right pelvic area?
My massive penis
Yes, the kidney itself can experience involuntary contractions or spasms, often referred to as renal colic, typically due to kidney stones or other obstructions. However, what people often describe as "twitching" may actually be muscle spasms in the surrounding abdominal area rather than the kidney itself. If you experience unusual sensations or pain in the kidney area, it's important to consult a healthcare professional for proper diagnosis and treatment.
smoking, obesity, hypertension are the most common causes for kidney tumor.
One might find information about treating muscle spasms at the online site WebMD. They have great details on the causes and potential treatments for these spasms.
The spasms you are feeling are muscle spasms. Muscle spasms are mostly caused by dehydration so you should try to hydrate yourself to stop them.
Things like this can happen to anyone, no matter how healthy.
One theory states that the effect of different stressors in the immature brain produces an abnormal excessive secretion of corticotropin-releasing hormone, which causes spasms.
You firstly need to find the reason and causes for your muscle spasms. Once you are clear on this there are several websites available full of information on the treatments available to you.
Propberly too much smoking causes liver and kidney problem