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# 23 Strange Signs Your Kidneys Might Be in Trouble
Your kidneys work quietly every day to filter waste from the blood, regulate fluid and electrolyte balance, help control blood pressure, and support red blood cell production.
The problem is that **early kidney disease often causes few or no symptoms**. Many people do not notice anything unusual until kidney function has already declined.
That means symptoms alone cannot diagnose kidney disease. Still, certain changes can be worth checking—especially when several appear together or you have risk factors such as diabetes or high blood pressure.
## 1. Persistent Fatigue
Kidney problems can contribute to fatigue in several ways.
When kidney function declines, waste products may build up in the blood. Kidney disease can also contribute to anemia because the kidneys help produce a hormone involved in red blood cell formation.
Possible signs include:
* Low energy
* Weakness
* Difficulty concentrating
* Feeling tired despite adequate sleep
Fatigue is very common and has many other causes, so it is not specific to kidney disease.
## 2. Puffy Eyes in the Morning
