What is the primary use of onion in traditional medicine?

Onions have a significant role in traditional medicine, and one of their primary uses is indeed related to the reduction of inflammation, particularly in the eyes. Onions contain various compounds, including quercetin, which possesses anti-inflammatory properties. In traditional practices, the juice or extracts from onions might be used as a poultice or in home remedies aimed at alleviating symptoms such as redness or swelling.

The use of onions for their anti-inflammatory effects can also extend to other areas of the body, but the application concerning the eyes highlights their benefits in soothing and reducing local inflammation. This medicinal quality is recognized in various herbal traditions, illustrating the onion's versatility and importance in healing practices.

While onions are also associated with benefits such as improving digestion and enhancing immune function due to their nutritional properties, the specific focus on their anti-inflammatory role, particularly concerning ocular conditions, is what sets this particular answer apart in the context of traditional medicinal uses.