: Homeostasis is the body's internal equilibrium; allostasis is the process of maintaining that balance through adaptation to stressors. "Allostatic load" refers to the "wear and tear" the body experiences when chronically stressed.
Today, the field covers a broader spectrum, including (physical symptoms without a clear organic cause) and nosogenia (psychological reactions to a physical disease, such as depression following a cancer diagnosis). Common Conditions Influenced by Stress Psychosomatic Medicine
Many chronic conditions are recognized as being significantly influenced or exacerbated by psychological factors: Psychosomatic Disorder: What It Is, Symptoms & Treatment : Homeostasis is the body's internal equilibrium; allostasis
Historically, seven diseases were famously classified as the "Chicago Seven" or "Holy Seven": Essential arterial hypertension Duodenal ulcers Nonspecific ulcerative colitis Bronchial asthma Thyrotoxicosis Rheumatoid arthritis Neurodermatitis the field covers a broader spectrum