Apeirophobia or the fear of infinity is an extreme phobia about eternal or everlasting things such as life, death etc. No one lives forever, but even the very idea of doing so is extremely scary for the individual suffering from it.
What is apeirophobia? Apeirophobia is the excessive and irrational fear of understanding the concept of infinity and eternity. This fear causes a great physical discomfort and can manifest itself at any time of day or night. An intrusive thought about infinity can cause a serious anxiety attack.