Cleavers (galium aparine) enhances the function of the lymphatic system and improves its ability to flush out toxins, decrease congestion and reduce swelling. The lymph-cleansing action of this herb in turn enhances the function of the immune system. Cleavers are a valuable diuretic. It stimulates the lymphatic system and is often used to treat skin problems ranging from seborrhea and eczema to psoriasis. The herb has also been used during serious ailments such as cancer, especially if there is nodal involvement.