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.
According to these thoughts, somatization disorder results from negative beliefs and exaggerated fears about the significance of physical sensations. Individuals with somatization disorder are thus more likely to believe that vague physical symptoms are indicators of serious disease and to seek treatment for them. For instance, someone with somatization disorder may fear that a headache signals a brain tumor, or that shortness of breath indicates the onset of asthma.