What causes dizziness, nausea, and loss of appetite on the first day of menstruation, and what should be done about it?

Generally, dizziness, nausea, and loss of appetite on the first day of menstruation may be caused by hormonal fluctuations, gastrointestinal dysfunction, dysmenorrhea, endocrine disorders, anemia, or other factors. Appropriate treatment should be based on the specific cause. The detailed analysis is as follows:

1. Hormonal Influence

On the first day of menstruation, women experience significant hormonal changes, including increased progesterone levels. These hormonal fluctuations may stimulate the gastrointestinal tract, leading to impaired digestive function and reduced digestion capacity, which can result in dizziness, nausea, and loss of appetite. These symptoms typically resolve gradually after menstruation ends.

2. Gastrointestinal Dysfunction

If a woman frequently overeats or consumes high-fat foods during this period, it may increase the burden on the gastrointestinal system, causing gastrointestinal dysfunction. When food remains in the stomach for prolonged periods and cannot be digested properly, such symptoms may occur. Patients are advised to take medications such as lactasin tablets or enteric-coated pancreatin capsules under medical guidance.

3. Dysmenorrhea

If a woman is exposed to cold or experiences excessive fatigue, it may lead to abnormal uterine contractions, increased prostaglandin levels, and elevated local pressure, impairing oxygen supply and resulting in menstrual pain and associated symptoms. It is recommended to use medications such as ibuprofen sustained-release capsules or acetaminophen tablets under medical supervision.

4. Endocrine Disorders

The endocrine system plays a crucial role in regulating the menstrual cycle. Imbalances in endocrine function may alter the menstrual cycle and trigger related physical symptoms. For example, fluctuations in estrogen and progesterone levels before menstruation may cause mood changes and gastrointestinal discomfort, including dizziness, nausea, and poor appetite. Patients may take herbal medicines such as Jia Wei Xiao Yao Pills or Qi Zhi Xiang Fu Pills under a doctor’s guidance.

5. Anemia

Anemia refers to red blood cell count or hemoglobin levels below the normal range. It can lead to insufficient oxygen delivery to body tissues, including the brain, potentially causing dizziness and nausea. These symptoms may become more pronounced on the first day of menstruation due to increased blood loss. Additionally, anemia may also contribute to poor appetite and indigestion. Patients can take medications such as iron dextran granules or vitamin B12 tablets under medical supervision.

In addition, these symptoms could also be caused by acute gastritis. If a patient experiences discomfort, timely medical consultation and standardized treatment under a doctor's guidance are recommended to promote recovery.