8 Signs Your Immune System Is Weak
5. You Feel Tired All the Time:

Chronic fatigue is another sign of a weakened immune system. Low-level inflammation caused by immune dysregulation can leave you feeling drained and exhausted. Studies show elevated inflammatory markers like IL-6 and TNF-α in people with persistent fatigue. This constant tiredness, sometimes called “sickness behavior,” occurs because your body is in a state of low-grade immune stress. Feeling tired even after proper rest could indicate your immunity is under strain.
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