"A deficiency of Blood is one of the most common patterns seen in women: it has many different manifestations and is often at the root of many other patterns. When we say ‘Blood deficiency’ in most cases we mean ‘Liver-Blood deficiency’ because the Liver houses Blood. However, the Heart governs Blood and Heart-Blood deficiency is also common. Also, the Spleen makes gu qi
which is the origin of Blood and so a deficiency of the Spleen may also lead to Blood deficiency."