Each of us has a specific capacity for managing stress; some people are naturally able to or have learned to handle much more than others. I find it helpful to envision each of us as a cup or beaker of different shapes and sizes. Stress is like liquid poured into our beakers. Major events can fill us up very quickly. If we never deal with our stressors then our glasses remain nearly full, decreasing our capacity to deal with more. Traumatic events often leave residue in our cups even when these events have been processed and healed. Even smaller events or situations can fill us to the brim when several are piled on top of each other. When our stress levels overflow, we can suffer the negative effects of stress. The specific symptoms from which you suffer is determined by your individual vulnerability. Some will suffer more from physical complaints, while others suffer more from psychological concerns. Your specific vulnerability is likely determined genetically. This is called the Diathesis Stress Model.