It depends on what kind of lump it is, if the lump is relatively small and easy to lose, generally related to static electricity, the reason for static electricity between milk powder particles is because the milk powder particles are relatively small, under the action of adsorption, plus the milk powder itself is relatively dry, the role of static electricity will be more obvious so that the lump will be formed.

        This is not a cause for concern. Usually, a gentle shake or a poke with the hand will loosen it and allow you to give your baby a drink.

       The other situation is many hard lumps, which may indicate that the milk powder is damp, possibly due to a collision leakage in transport, or milk powder in the process of storage of milk powder fell, resulting in the rupture of the milk powder cans, which allowed air into the milk powder cans, milk powder in the water rose, resulting in milk powder deterioration, hard lumps.

        This situation can not be given to the baby to drink.