Why do nausea symptoms worsen in the afternoon and evening during pregnancy?

For most pregnant women, one of the most memorable experiences may be nausea and vomiting of pregnancy (NVP). During early pregnancy, hormonal fluctuations can readily trigger nausea and vomiting. Common symptoms include nausea, loss of appetite, and morning sickness; in severe cases, women may even be unable to eat normally. So why do some women experience nausea in the afternoon or evening during pregnancy?

Why Nausea Occurs in the Afternoon or Evening During Pregnancy

Nausea and vomiting in the afternoon or evening during pregnancy are often linked to individual dietary habits and irregular daily routines. Additionally, during early pregnancy—around six weeks after the last menstrual period—approximately 50% of women develop gastrointestinal symptoms such as gastric reflux, excessive gastric acid secretion, or abnormal digestive enzyme activity, all of which can cause nausea and discomfort. Strong or irritating odors may also provoke these symptoms. If nausea occurs, oral vitamin B6 supplementation may help; it is advisable to avoid high-fat foods and instead consume apples or lemons.

Pregnant women should prioritize adequate sleep and, whenever possible, avoid taking medications. During early pregnancy, the fetus is particularly vulnerable, so sufficient rest and high-quality sleep are essential to support healthy fetal development and maintain circadian rhythm stability. If upper respiratory tract infection symptoms arise during pregnancy, self-medication must be avoided. Unsupervised drug use may adversely affect fetal development and even lead directly to congenital malformations. Therefore, any necessary medication should only be taken under a physician’s guidance.

Throughout pregnancy, women are advised to avoid overexertion, maintain balanced nutrition, and refrain from picky eating. We hope this information proves helpful.