What causes a person to feel weak and extremely fatigued?

Under normal circumstances, general weakness and extreme fatigue in an individual may be caused by overexertion, hypoglycemia, anemia, hypothyroidism, or depression. These conditions can be improved through general management measures, medication, and other treatments. Specific analyses are as follows:

1. Overexertion: Long-term熬夜, working overtime, or similar behaviors may lead to excessive physical fatigue, manifesting as symptoms such as drowsiness, fatigue, and poor mental alertness. In such cases, no special treatment is required; increasing sleep duration appropriately and relieving fatigue through massage or taking hot baths may be sufficient.

2. Hypoglycemia: This may be related to factors such as malnutrition or irregular eating habits, and can cause symptoms including weakness, sweating, tachycardia, and fatigue. Patients may take medications such as Ejiao Buxue Granules or Shengmai Yin under medical supervision.

3. Anemia: This may result from an unbalanced diet or excessive dieting, commonly causing symptoms like fatigue, easy tiredness, dizziness, and headaches. Patients may take medications such as vitamin B12 tablets or ferrous sulfate tablets under a doctor's guidance.

4. Hypothyroidism: This may be caused by factors such as autoimmune damage or thyroid destruction, often leading to symptoms including pale complexion, easy fatigue, apathetic expression, and dry skin. Patients may take medications such as thyroid tablets or alfacalcidol soft capsules under medical direction.

5. Depression: This is usually associated with abnormal cytokines or sex hormones, and may present as low mood, slowed thinking, and fatigue. Patients may take medications such as clomipramine hydrochloride tablets or amitriptyline hydrochloride tablets under a doctor’s supervision.

In daily life, it is important to develop healthy habits, avoid staying up late, and refrain from heavy physical labor.