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Does stress cause ulcers? What is post-traumatic stress disorder (PTSD)? Does stress cause ulcers? Doctors used to think that ulcers were caused by stress and spicy foods. Now, we know that stress doesnt cause ulcers―it just irritates them. Ulcers are actually caused by a bacterium (germ) called H. pylori. Researchers dont yet know for sure how people get it. They think people might get it through food or water. Its treated with a combination of antibiotics and other drugs. Stress is simply a fact of nature -- forces from the inside or outside world affecting the individual. The individual responds to stress in ways that affect the individual as well as their environment. Because of the overabundance of stress in our modern lives, we usually think of stress as a negative experience, but from a biological point of view, stress can be a neutral, negative, or positive experience. In general, stress is related to both external and internal factors. External factors include the physical environment, including your job, your relationships with others, your home, and all the situations, challenges, difficulties, and expectations you're confronted with on a daily basis. Internal factors determine your body's ability to respond to, and deal with, the external stress-inducing factors. Internal factors which influence your ability to handle stress include your nutritional status, overall health and fitness levels, emotional well-being, and the amount of sleep and rest you get. Stress has driven evolutionary change (the development and natural selection of species over time). Thus, the species that adapted best to the causes of stress (stressors) have survived and evolved into the plant and animal kingdoms we now observe. Picture of areas of the body that are affected by stress Picture of some of the areas of the body that are affected by stress Man is the most adaptive creature on the planet because of the evolution of the human brain, especially the part called the neo-cortex. This adaptability is largely due to the changes and stressors that we have faced and mastered. Therefore, we, unlike other animals, can live in any climate or ecosystem, at various altitudes, and avoid the danger of predators. Moreover, most recently, we have learned to live in the air, under the sea, and even in space, where no living creatures that we know of have ever survived. So then, what is so bad about stress? A brief history of stress A key to the understanding of the negative aspects of stress is the concept of milieu interieur (the internal environment of the body), which was first advanced by the French physiologist Claude Bernard. In this concept, he described the principles of dynamic equilibrium. In dynamic equilibrium, constancy, a steady state (situation) in the internal bodily environment, is essential to survival. Therefore, external changes in the environment or external forces that change the internal balance must be reacted to and compensated for if the organism is to survive. Examples of such external forces include temperature, oxygen concentration in the air, the expenditure of energy, and the presence of predators. In addition, diseases were also stressors that threatened the constancy of the milieu interieur. The neurologist Walter Cannon coined the term homeostasis to further define the dynamic equilibrium that Bernard had described. He also was the first credited with recognizing that stressors could be emotional as well as physical. Through his experiments, he demonstrated the "fight or flight" response that man and other animals share when threatened. Further, Cannon traced these reactions to the release of powerful neurotransmitters from a part of the adrenal gland, the medulla. (Neurotransmitters are the body's chemicals that carry messages to and from the nerves.) The adrenal medulla secretes two neurotransmitters, epinephrine (also called adrenaline) and norepinephrine (noradrenaline), in the response to stress. The release of these neurotransmitters leads to the physiologic effects seen in the fight or flight response, for example, a rapid heart rate, increased alertness, etc. Hans Selye, another early scientist who is known to have studied stress, extended Cannon's observations. He included, as part of the body's stress response system, the pituitary gland, a small gland at the base of the brain. He described the control by this gland of the secretion of hormones (for example, cortisol) that are important in the physiological response to stress by the other part of the adrenal gland known as the cortex. Additionally, Selye actually introduced the term stress from physics and engineering and defined it as "mutual actions of forces that take place across any section of the body, physical or psychological." In his experiments, Selye induced stress in rats in a variety of ways. He found typical and constant psychological and physical responses to the adverse situations that were imposed on the rats. In rats exposed to constant stress, he observed enlargement of the adrenal glands, gastrointestinal ulcers, and a wasting away (atrophy) of the immune (defense) system. He called these responses to stress the general adaptation (adjustment) or stress syndrome. He discovered that these processes, which were adaptive (healthy, appropriate adjustment) and normal for the organism in warding off stress, could become much like illnesses. That is, the adaptive processes, if they were excessive, could damage the body. This observation, then, was the beginning of an understanding of why stress, really overstress, can be harmful, and why the word stress has earned such a bad name. It is also known that people under stress have a greater tendency to engage in unhealthy behaviors, such as excessive use or abuse of alcohol and drugs, cigarette smoking, and making poor exercise and nutritional choices, than their less-stressed counterparts. These unhealthy behaviors can further increase the severity of symptoms related to stress, often leading to a "vicious cycle" of symptoms and unhealthy behaviors. The experience of stress is highly individualized. What constitutes overwhelming stress for one person may not be perceived as stress by another. Likewise, the symptoms and signs of poorly managed stress will be different for each person. Does stress cause ulcers? What is post-traumatic stress disorder (PTSD)? Post-traumatic stress disorder (PTSD) can be a debilitating condition that can occur after exposure to a terrifying event or ordeal in which grave physical harm occurred or was threatened. Traumatic events that can trigger PTSD include violent personal assaults such as rape or mugging, natural or human-caused disasters, accidents, or military combat. Many people with PTSD repeatedly re-experience the ordeal in the form of flashback episodes, memories, nightmares, or frightening thoughts, especially when they are exposed to events or objects that remind them of the trauma. Anniversaries of the event can also trigger symptoms. People with PTSD also can have emotional numbness, sleep disturbances, depression, anxiety, irritability, or outbursts of anger. Feelings of intense guilt (called survivor guilt) are also common, particularly if others did not survive the traumatic event. Most people who are exposed to a traumatic, stressful event have some symptoms of PTSD in the days and weeks following the event, but the symptoms generally disappear. But about 8% of men and 20% of women go on to develop PTSD, and roughly 30% of these people develop a chronic, or long-lasting, form that persists throughout their lives. |