Evidence does not show a link between hyperthyroidism, or overactive thyroid, and blood in the urine (hematuria).
Experiencing blood in your urine may result from issues with your bladder, kidneys, or urethra. Common causes include urinary tract infections (UTIs), kidney stones, or an enlarged prostate.
It’s also possible for your urine to appear red due to certain medications or food, such as beets or rhubarb. What appears to be blood in your urine may also be coming from somewhere else, for example, your bowel or vagina.
Blood in the urine is not usually serious, but it’s important to get prompt medical help to find the cause. In rare instances, it can be a sign of cancer.
Symptoms of hyperthyroidism may differ in each person but
- weight loss despite having an increased appetite
- fast or irregular heartbeat
- feeling nervous, irritable, or tired
- having difficulty sleeping
- shaky hands and muscle weakness
- sweating
- increased bowel movements
- goiter (an enlargement in the neck)
A doctor might ask about when you typically see blood in your urine, how much you see, and whether you have blood clots. They’ll also want to know how often you urinate, whether you’re experiencing any pain, and what medications you’re currently taking.
They’ll examine you and take a urine sample to test for bacteria that may indicate an infection, such as a UTI.
They may also order other tests, such as a CT scan, ultrasound, and cystoscopy. A cystoscopy involves using a small tube with a camera attached to look inside your urethra and bladder. This can help determine the cause of hematuria.