Any protein "causes" ammonia in the blood. It's a normal product of digestive metabolism. It's then converted to urea in normal people and excreted by the kidneys.
If you mean an *abnormal buildup* of ammonia in the blood, that's a thing you can only know by having your blood tested and those results interpreted by your healthcare provider. There's no way - and wouldn't be safe to try - to "guesstimate" those values without proper testing.
However, on a brief search, I happened across these resources:
www.webmd.com/digestive-disorders/ammonia- test “Most ammonia in the body forms when protein is broken down by bacteria in the intestines. The liver normally converts ammonia into urea, which is then eliminated in urine. Ammonia levels in the blood rise when the liver is not able to convert ammonia to urea.”
We aren't able to determine the cause for what you are experiencing. You need to make an appointment with your Dr for an examination. There may be other things at play. In my case it was painful, itching hives caused by an intolerance to some food - too much acidic fruit/veges.
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