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.
Pain in the groin 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 pain in the groin 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 pain in the groin is often associated with alternating fever and chills in the pattern “Blood Stagnation with Heat”.
Once identified, patterns are treated using medicinal herbs, acupuncture, and other therapies. In the case of pain in the groin we’ve identified that a herbal formula called Da Huang Mu Dan Pi Tang can help treat the patterns behind the symptom.
In Chinese Medicine pain in the groin is a symptom for the pattern "Blood Stagnation with Heat". Below is a small explanation for it with links for more details.
Pulse type(s): Rapid (Shu), Slippery (Hua)
Tongue coating: Yellow coating
Tongue color: Pale
Blood Stagnation with Heat is often treated with Da Huang Mu Dan Pi Tang, a herbal formula made of 5 herbs (including Rhubarb - Da Huang - as a key herb). Da Huang Mu Dan Pi Tang belongs to the category of "formulas that clear internal abscesses and sores", which might be why it is often recommended for this pattern. Its main action as a formula is: "Clears Stagnant Heat in the intestines".
Source date: 220 AD
Number of ingredients: 5 herbs
Key actions: Clears Stagnant Heat in the intestines. Reduces swelling and disperses lumps.
Because it is a formula often recommended to treat the pattern 'Blood Stagnation with Heat' of which pain in the groin is a symptom.
Other symptoms characteristic of Blood Stagnation With Heat include alternating fever and chills.
Its main actions are: Drains Excess Heat and eliminates Dampness, especially when in the Sunlight Yang stage. Cools the Blood and stops bleeding. Invigorates Blood, breaks up Stasis and relieves pain. Clears Heat and toxins from Excess. Applied topically for Hot sores and Blood Stasis.