Brief Answer:
there are some disorders to check for

Detailed Answer:
Hello,

foamy urine is classically associated with proteinuria. If there is no protein in your urine in a 24h collection then proteinuria can be safely excluded. Other potential causes may include the presence of a fistula between the bladder and the intestine. Inflammatory disorders or tumors of the intestines are the most likely causes in this case. A CT scan or barium enema may help to identify the fistula. In such cases frequent lower urinary tract infections are expected to occur.

Another potential cause is a rare form of cystitis which results in gas formation inside the bladder (emphysematous cystitis). This is supposed to cause serious urinary tract symptoms and foamy urine wouldn't have been the single complaint.

Lipiduria is perhaps another thing to consider but this is commonly associated with protein loss as well so negative proteins in a 24h collection probably means that there is no lipiduria.

I don't thing there is any association with your veins or the drug you're taking.

One final note: there is no objective definition for "foamy urine" so this is usually a patient's description. Perhaps your doctor should check your urine to see if they look strange or not. Some patients may be alarmed with minor 'findings' due to anxiety.

I hope you find my comments helpful!
Kind regards!

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Brief Answer:
Usually yes

Detailed Answer:

Hi,

I can't comment on your symptom (intestinal gas) in relation to the foamy urine because I don't believe they're connected. Having a distended bowel (too much gas) may indeed cause an urgency to urinate. Passing gas may relieve the urgency. Foamy urine are not expected to occur though.

The thyroid nodule is irrelevant as well.

Patients with fistula are expected to have at least many bacteria in their urine as the intestine is full of them. Your urinalysis is completely normal which is very much against a fistula (but not 100% certain).

I've check the link and it doesn't add much more information (if any). Most of the suggested etiologies can be excluded by your test reports. Cloudy urine is different from foamy urine. Cloudy means you can see clearly though the urine. Foamy means they're full of bubbles.

So in conclusion, I can't suggest any potential cause besides the fistula. Perhaps your doctor should order appropriate testing to exclude it (or confirm it).

Kind regards!

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Brief Answer:
I've seen that

Detailed Answer:

Hi,

Yes, I've seen that!

It's just that the causes mentioned there are not adding anything more to what we've discussed already. Many potential causes are mentioned but most of them are connected directly or indirectly to proteinuria. The only other cause mentioned there (besides proteinuria-related causes) is the fistula.

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