The information provided here is not a replacement for a doctor. You shouldn't use it for the purpose of self-diagnosing or self-medicating but rather so you can have a more informed discussion with a professional TCM practitioner.
Vomiting of roundworms can be the consequence of several so-called “patterns of disharmony” in Chinese Medicine.
Chinese Medicine sees the body as a system, not a sum of isolated parts. A "pattern" is when the system's harmony is disrupted, leading to symptoms or signs that something is wrong (like vomiting of roundworms here). It is similar to the concept of disease in Western Medicine but not quite: a Western disease can often be explained by several Chinese patterns and vice-versa.
A pattern often manifests itself in a combination of symptoms that, at first glance, do not seem necessarily related to each others. For instance here vomiting of roundworms is often associated with feeling of energy rising to the chest, cold limbs and diarrhea in the pattern “Terminal Yin stage”.
Once identified, patterns are treated using medicinal herbs, acupuncture, and other therapies. In the case of vomiting of roundworms we’ve identified that a herbal formula called Wu Mei Wan can help treat the patterns behind the symptom.
In Chinese Medicine vomiting of roundworms is a symptom for the pattern "Terminal Yin stage". Below is a small explanation for it with links for more details.
Pulse type(s): Wiry (Xian)
Terminal Yin stage is often treated with Wu Mei Wan, a herbal formula made of 9 herbs (including Chinese Plums - Wu Mei - as a key herb). Wu Mei Wan belongs to the category of "formulas that expel parasites", which might be why it is often recommended for this pattern. Its main action as a formula is: "Warms the Organs".
Source date: 220 AD
Number of ingredients: 9 herbs
Key actions: Warms the Organs. Drains Heat. Calms roundworms. Drains the Liver. Calms the Stomach.
Because it is a formula often recommended to treat the pattern 'Terminal Yin stage' of which vomiting of roundworms is a symptom.
Its main actions are: Stabilizes Lung Qi and stops cough. Stops diarrhea. Retains Bodily Fluids and encourages their production. Expels parasites and relieves vomiting.