What causes excessive sweating during pregnancy?

Generally, excessive sweating during pregnancy may be caused by hormonal changes, increased metabolic rate, anemia, hyperthyroidism, gestational diabetes, and other factors. Symptomatic management such as general care or medication may be needed. If experiencing discomfort, it is recommended to seek timely medical advice and receive appropriate treatment under a doctor's guidance. Detailed explanations are as follows:

1. Hormonal Changes

During pregnancy, estrogen and progesterone levels significantly increase. These hormonal fluctuations can affect the body's thermoregulatory center, causing the body temperature to be slightly higher than normal, which makes sweating more likely, especially at night or after physical activity. Pregnant women are advised to wear breathable and sweat-absorbing clothing and maintain good indoor ventilation to alleviate discomfort caused by sweating.

2. Increased Metabolic Rate

To meet the growth and developmental needs of the fetus, a pregnant woman's metabolic rate increases. This means the body generates more heat, and sweating becomes a primary mechanism for heat dissipation. It often manifests as profuse sweating even after mild exertion, and the woman may feel fatigued and thirsty. It is recommended that pregnant women increase their water intake appropriately, avoid overexertion, and maintain a regular sleep schedule.

3. Anemia

Due to hemodilution and increased fetal demand for iron during pregnancy, pregnant women are prone to develop anemia. In such cases, the body may compensate for reduced oxygen delivery by increasing heart rate and respiratory rate, which can lead to excessive sweating. Symptoms such as fatigue and pallor may also accompany anemia. Iron supplements, such as compound ferrous sulfate granules, iron dextran tablets, folic acid tablets, etc., should be taken as directed by a physician.

4. Hyperthyroidism

Hyperthyroidism may be triggered by autoimmune disorders, genetic predisposition, environmental factors, and others. This condition causes excessive secretion of thyroid hormones, accelerating whole-body metabolism, including thermoregulation, which results in increased sweating to dissipate heat. Symptoms such as palpitations, hand tremors, and weight loss may also occur. Anti-thyroid medications like metoprolol tartrate tablets, propylthiouracil tablets, carbimazole tablets, etc., should be used under medical supervision to manage thyroid function.

5. Gestational Diabetes

Gestational diabetes is mainly caused by hormonal changes during pregnancy, genetic factors, obesity, and other influences. The hyperglycemic state in gestational diabetes may disrupt the balance of the autonomic nervous system, particularly causing overactivity of the sympathetic nervous system, leading to increased sweating. Symptoms such as thirst, frequent urination, and fatigue may also be present. Medications such as insulin glargine injection, insulin aspart injection, insulin degludec injection, etc., should be used as directed by a physician for treatment.

Excessive sweating can easily lead to dehydration; therefore, it is recommended to drink more warm water and appropriately consume mild saltwater or fruit juice to replenish fluids and electrolytes promptly.