The use of plants from the Brassica genus (such as cabbage, broccoli, and mustard greens) in the support or treatment of hemorrhoids is primarily based on traditional medicine rather than robust scientific evidence. Historically, various cultures have used cabbage leaves topically for their purported anti-inflammatory and soothing effects on swollen tissues, including hemorrhoids. This use is likely attributed to the cooling effect of the leaves and their content of compounds like vitamin K and glucosinolates, which are thought to have some anti-inflammatory properties.

However, scientific studies directly evaluating the efficacy of Brassica species for hemorrhoids are lacking. Most of the evidence is anecdotal or derived from general principles of herbal medicine, not from controlled clinical trials. While Brassica vegetables are well-studied for their nutritional benefits and potential anticancer properties, specific research on hemorrhoidal relief is minimal. Therefore, while the traditional use exists — especially in European and some Asian folk medicine — the strength of evidence supporting their effectiveness for hemorrhoids is low.

In summary, the application of Brassica for hemorrhoids is based on tradition rather than scientific proof, and its use should be considered complementary and not a substitute for evidence-based medical treatments.