What constitutes a fear-inducing illness where death is not immediately certain but feared?

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An illness that causes fear of impending death without certainty is categorized as fear-inducing. Examples include *Al-Barsam* (a vapor affecting the brain causing intellectual derangement), severe fever (*Al-Humma Al-Salib*), constant bleeding from the nose which drains strength, pleurisy, heart and lung ailments that prevent healing due to constant movement, and colic where food solidifies in the intestines. These conditions are deemed fear-inducing whether accompanied by fever or not, becoming more severe if fever is present. Extreme heat causing blood to surge to a limb, or an outbreak of yellow bile or phlegm causing excessive dryness or extinguishing vital heat, also fall under this category. Plague is also fear-inducing due to extreme heat affecting the entire body.