Horse chestnut seeds' extracts, known for their shiny brown exterior and commonly collected by children during autumn, have been scientifically proven to alleviate the discomfort and swelling caused by varicose veins. These seeds, whether consumed orally or applied as a lotion, can strengthen the affected tissues and provide relief. In addition, horse chestnuts may also be effective in reducing fluid retention. Horse chestnuts effectively treat various venous issues, such as varicose veins, venous ulcers, hemorrhoids, and frostbite, through numerous clinical trials. In 1996, a study published in London found that horse chestnut extract was as effective in treating varicose veins as compression stockings. Horse chestnut extracts and aescin are commonly used to treat varicose veins in Germany. A review of clinical trials by the Cochrane Database in 2006 concluded that horse chestnut extract is a safe and effective short-term treatment for chronic venous insufficiency. This condition includes leg swelling and thread veins. Horse chestnut is primarily used to treat problems with the veins, such as varicose veins, piles, and leg ulcers. It helps to improve the tone of the vein walls and reduce fluid retention caused by distended veins. It can also be applied locally as a lotion, gel, or ointment to treat frostbite. Additionally, horse chestnut can increase the permeability of capillaries, allowing excess fluid to drain back into the circulatory system. It might also have a beneficial effect on the heart and arteries. Horse chestnuts can be taken internally or used as a decoction of the bark or leaves as an astringent lotion for varicose veins.