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When heat comes from a direct contact source it has to heat the external layer of the skin, and heat is transferred to the deeper layer by conduction. Since heat conduction needs a temperature gradient to proceed, and there is a maximum temperature that can be safely used (around 42 °C), this means lower temperature where warming is needed.
Heat illness is a spectrum of disorders due to increased body temperature. It can be caused by either environmental conditions or by exertion. It includes minor conditions such as heat cramps, heat syncope, and heat exhaustion as well as the more severe condition known as heat stroke. [1] It can affect any or all anatomical systems. [2]
Simplified control circuit of human thermoregulation. [8]The core temperature of a human is regulated and stabilized primarily by the hypothalamus, a region of the brain linking the endocrine system to the nervous system, [9] and more specifically by the anterior hypothalamic nucleus and the adjacent preoptic area regions of the hypothalamus.
Extremes of age, heat waves, high humidity, certain drugs, heart disease, skin disorders [3] Diagnostic method: Based on symptoms [3] Differential diagnosis: Neuroleptic malignant syndrome, malaria, meningitis [3] Treatment: Rapid cooling, supportive care [4] Prognosis: Risk of death <5% (exercise induced), up to 65% (non-exercise induced) [3 ...
Light therapy is preferred over antidepressants in the treatment of SAD because it is a relatively safe and easy therapy. [20] Two methods of light therapy, bright light and dawn simulation, have similar success rates in the treatment of SAD. [21] It is possible that response to light therapy for SAD could be season dependent. [22]
If the condition progresses to heat stroke, then hot, dry skin is typical [2] as blood vessels dilate in an attempt to increase heat loss. An inability to cool the body through perspiration may cause dry skin. Hyperthermia from neurological disease may include little or no sweating, cardiovascular problems, and confusion or delirium.
This is a xu (deficient) heat, meaning the treatment is nourishing yin and not clearing heat Cold-frequent urination with clear urine, cold extremities, aversion to cold, perhaps the body has aching joints and diarrhea. treatment method is warming and supportive. Tongue-Red if hot pattern, pale if cold pattern Pulse-faint and weak -rapid with heat
Erythema ab igne (Latin for 'redness from fire') EAI, also known as hot water bottle rash, [2] is a skin condition caused by long-term exposure to heat (infrared radiation). [3] Prolonged thermal radiation exposure to the skin can lead to the development of reticulated erythema , hyperpigmentation , scaling, and telangiectasias in the affected ...