Not to sound pedantic, but there are many who differentiate between pain and suffering.
As the saying goes, Pain is inevitable, suffering is optional. Buddhist philosophy (I am differentiating from Buddhist dogmatic traditions) addresses these concepts very directly:
The Four Noble Truths are a contingency plan for dealing with the suffering humanity faces -- suffering of a physical kind, or of a mental nature. The First Truth identifies the presence of suffering. The Second Truth, on the other hand, seeks to determine the cause of suffering. In Buddhism, desire and ignorance lie at the root of suffering. By desire, Buddhists refer to craving pleasure, material goods, and immortality, all of which are wants that can never be satisfied. Ignorance, in comparison, relates to not seeing the world as it actually is. Without the capacity for mental concentration and insight, Buddhism explains, one's mind is left undeveloped, unable to grasp the true nature of things. Vices, such as greed, envy, hatred and anger, derive from this ignorance.
The Third Noble Truth... the truth of the end of suffering... through achieving Nirvana. When one has achieved Nirvana, which is a transcendent state free from suffering, spiritual enlightenment has been reached. The Fourth Noble truth charts the method for attaining the end of suffering, known to Buddhists as the Noble Eightfold Path. The steps of the Noble Eightfold Path are Right Understanding, Right Thought, Right Speech, Right Action, Right Livelihood, Right Effort, Right Mindfulness and Right Concentration. Moreover, there are three themes into which the Path is divided: good moral conduct (Understanding, Thought, Speech); meditation and mental development (Action, Livelihood, Effort), and wisdom or insight (Mindfulness and Concentration).
From http://www.pbs.org/edens/thailand/buddhism.htm