There are about 2,500 BTU in one cubic foot of propane and only about 1,000 BTU in one cubic foot of natural gas. Manufacturers tout the number of BTU their grills can produce, but the number can be very misleading. BTU is not indicative of the heat it can generate.
When physical symptoms considered to be somatic symptom disorder occur, it can be difficult to accept that a life-threatening illness has been eliminated as the cause. Symptoms cause very real distress for the person and reassurance isn't always helpful. Specific sensations, such as pain or shortness of breath, or more general symptoms, such as fatigue or weakness. 2  Unrelated to any medical cause that can be identified, or related to a medical condition such as cancer or heart disease, but more significant than what's usually expected.
This condition was previously referred to as âhypochondriasis.â Unlike somatic symptom disorder, a person with illness anxiety disorder generally doesnât experience symptoms. Conversion disorder is a condition in which symptoms affect a personâs perception, sensation or movement with no evidence of a physical cause.