Alternating chills and fever, with generalized weakness.

Alternating chills and fever, along with general weakness, may be caused by factors such as sleep deprivation, neurasthenia, anemia, menopausal syndrome, or hypothyroidism. These conditions can be managed through general measures or medication. Specific details are as follows:

1. Sleep Deprivation

If individuals overwork or lack sufficient sleep in daily life, it may lead to autonomic nervous system dysfunction, resulting in generalized fatigue. It is important to get adequate rest and avoid excessive fatigue.

2. Neurasthenia

This condition is usually caused by prolonged stress, psychological pressure, or irregular作息 (daily routines), leading to emotional distress and sleep disturbances. Symptoms such as overall weakness and insomnia may occur. Under medical guidance, medications such as Anshen Bunaoye (tonic for calming the mind and nourishing the brain) or flupentixol-melitracen tablets may be prescribed.

3. Anemia

Anemia refers to a decrease in the number or quality of red blood cells in the blood, which reduces oxygen-carrying capacity. This can cause generalized fatigue and poor circulation, leading to alternating sensations of cold and heat in the body.

4. Menopausal Syndrome

This typically refers to a range of symptoms caused by the gradual decline or loss of ovarian function before and after menopause, resulting in decreased estrogen levels. Symptoms may include sudden hot flashes and chills, as well as significant mood swings. Under medical supervision, medications such as estradiol valerate tablets or oryzanol tablets may be used for treatment.

5. Hypothyroidism

Hypothyroidism is a condition in which the thyroid gland fails to produce sufficient thyroid hormones. These hormones are essential for normal metabolism and play a key role in regulating body temperature and energy metabolism. Patients may find it difficult to maintain a stable body temperature, experiencing alternating chills and heat. In addition, hypothyroidism often causes generalized weakness, fatigue, and a feeling of lethargy. Treatment may include medications such as levothyroxine sodium tablets or thyroid extract tablets, taken as directed by a physician.

Regular, moderate physical exercise can help improve immunity. If any discomfort occurs, prompt medical attention is recommended.