Can I drink Houttuynia cordata (snake tongue grass) water during menstruation?

Generally, it is not recommended to drink Hedyotis diffusa water during menstruation. The detailed explanation is as follows:

Hedyotis diffusa water usually refers to a beverage prepared by boiling Hedyotis diffusa (also known as Oldenlandia diffusa or Bai Hua She She Cao). This herb is a traditional Chinese medicinal material known for its effects of clearing heat, detoxifying the body, promoting diuresis, and relieving urinary discomfort. However, due to its bitter taste and cold nature, it may not be suitable for women during their menstrual period. Because Hedyotis diffusa is cold in nature, consuming it during menstruation may cause abdominal chilliness, potentially triggering or worsening dysmenorrhea (menstrual pain). Additionally, while this herb has properties that promote blood circulation and reduce swelling, it might also lead to excessive menstrual flow or hinder smooth discharge of menstrual blood, thus negatively affecting women's health.

During menstruation, women should opt for warming and nourishing foods such as red dates, goji berries, and brown sugar, which can help promote menstrual blood discharge and relieve menstrual pain. It is important to maintain a balanced diet with adequate intake of protein, iron, and vitamins from sources like lean meat, fish, vegetables, and fruits. Cold or raw foods—such as iced drinks and ice cream—should be avoided, as they may exacerbate menstrual discomfort.