It is known that the most common cause for the lacking of brest milk supply are inadequate food and fluid intake, fatigue, high stress levels and feeding the baby too infrequently or for only short periods of time. So if you want to increast your breast milk naturally, firstly you need enough sleep and relax yourself. Then you need to eat a healthy anti-inflammatory diet, drink much nutritive soap. Some food can increase breast milk such as oatmeal,spinach,brewer's yeast, fenugreek and apricots. Most importantly, breastfeed often, because the more often and the longer your baby latches on to suck, the more milk you'll produce.