Hygiene factors are the factors which should provided to any employee and they are the primary ones in order to fulfill their needs. They are very necessary so that the employee is able to obtain the other needs in his or her being. These are the factors which can be also regarded to as those of physiological needs in Abraham Maslow's hierachy of needs.
On the other hand, motivational factors are those factors which now follow after the hygiene also called primary need factors are fulfilled. Someone is not able to meet his or her needs if at all he or she was not able to meet the hygiene needs.
Therefore hygiene needs are refered to the primary factors in the other words while mativational factors are those factors which need fulfillness of the hygiene factors so that they can exist.