Pregnant women often have some physical abnormalities during pregnancy because their body hormone levels and physiological state are very different from those before pregnancy, such as sweating in bed during pregnancy, mainly due to hormonal changes in pregnant women, calcium deficiency and plant nerve disorders, pregnant women do not need to worry too much, as long as they usually pay attention to diet and rest, regularly go to the hospital for pregnancy tests, and follow up and treat regularly according to the doctor’s guidance and recommendations.1. Hormone level change: During pregnancy, the level of estrogen and progesterone will rise rapidly, which will lead to active adrenal cortical function in the body, so pregnant women will sweat a lot in their sleep, which is a normal pregnancy reaction, pregnant women and their families do not need to worry too much. Pregnant women can change to light, breathable clothing at night, but pay attention not to catch cold; 2, body calcium deficiency: some pregnant women in pregnancy calcium deficiency will also appear to sleep sweating symptoms, but sweating parts appear in the chest, palms, feet, but not the whole body sweating, and pregnant women will feel obvious physical characteristics such as lack of body, weakness. In this case, pregnant women can take oral calcium supplements as prescribed by the doctor, and they can also eat more calcium-rich foods in their daily diet, such as milk and soy products, and get more sunlight to promote the absorption of calcium; 3. Phytodisorders: pregnant women who have complications with phytodisorders during pregnancy will also have the phenomenon of sleeping sweats, which may also be accompanied by dizziness, fatigue, palpitations, chest tightness, frequent urination, urinary urgency, stress urinary incontinence and other symptoms. The cause needs to be identified and treated according to the cause. If hypotension can be adjusted by improving lifestyle and appropriate high-salt diet, and if necessary, medication can be taken under the guidance of a doctor.