The quote describes the next symptom where a person with FFI begins to experience hallucinations. Acute insomnia can affect thought function and the ability to distinguish reality from dreams or imagination. A person with FFI may also experience neurotransmitter disturbances that affect cognitive function and emotions that can lead to hallucinations.
Out there, the sickly one trembled like a new born animal, even with the extra jacket that Akaashi had offered him.
The quote describes how a person with FFI will feel sensitive to the weather or the air around them.
Bokuto would lay still for quite a while, his head tilted to the side with one hand on his stomach, and the other at his side. When he was like this, Bokuto would twitch awake again, his body jerking him from what little relaxation he tried to achieve.
Bokuto would wince and snap back to reality the way someone would when they dreamt they were falling.
Akaashi watched as one of Bokuto's hands twitched involuntarily, and to his dismay, it wouldn't stop.
The quote illustrates how difficult it is for a person with FFI to just sleep and rest their body. A person with FFI will often experience myoclonus which causes involuntary muscle twitching and jerking movements.
Frail, shaking fingers pushed through his own black and white hair in an attempt to calm himself down, but another thunder clap sounded, louder that time. Bokuto flinched hard enough to make the bed shake.
"F-f-u-ck." His voice broke in terror.
The quote illustrates that a person with FFI will experience panic attacks and a specific fear or phobia of something.
Bokuto had gone from a general one-hundred and fifty pounds to a mere ninety-seven pounds, last time they'd weighed him. The drastic weight loss was awful enough, but as if to add insult to injury, Bokuto's worsening condition also made it increasingly difficult for him to walk, move, and speak.