This means:
“The post claims that there are 17 visible or noticeable signs that could indicate a kidney problem, and it particularly emphasizes the third sign.”
Breakdown
“17 signs” = promises a long list of symptoms or physical changes.
“Kidney trouble” = refers broadly to kidney problems or impaired kidney function.
“You can see” = suggests some warning signs are visible, such as swelling or changes in urine.
“Don’t ignore #3!” = creates urgency and curiosity by singling out one supposedly especially important symptom.
Important point
This is health clickbait. Kidney disease often has few or no obvious symptoms in its early stages, so visible signs alone aren’t a reliable way to detect it.
Possible warning signs can include swelling in the legs or around the eyes, changes in urination, blood or unusually foamy urine, persistent fatigue, nausea, itching, or shortness of breath. However, these symptoms can have many other causes.
Kidney problems are often detected through blood tests (such as creatinine/eGFR) and urine tests, rather than appearance alone.
A more accurate version:
“17 possible signs of kidney problems—and why testing is important for early detection.”
