Suffering (or pain in this sense) is a negative basic feeling or emotion that involves unpleasantness, aversion, harm or threat of harm.
All sentient beings suffer during their lives, in diverse manners, and often dramatically. No field of human activity deals with the whole subject of suffering, but many are concerned with its nature and processes, its origin and causes, its meaning and significance, its related personal, social, and cultural behaviors, its remedies, management, and uses.