Thinking about the universe and the infinite can provoke certain questions or reflections that are difficult to answer, which can cause us some degree of anxiety. Now, when this thought about the infinite or the immense things produces an extreme irrational fear and a great discomfort, then we are before a case of apeirophobia.
The concept of apophobia refers to an unusual type of phobia. We usually speak with total normality of other phobias in which its phobic object is tangible: phobia to the spiders or the phobia to the clowns, for example. All of them objects or people that can be easily touched and avoided. For some, imagining the infinity phobia can even be complicated.
The fear of infinity can appear both by day and by night. For example, when the subject who suffers it is so calm in the living room of his house and an intrusive thought about infinity causes him a serious problem of anxiety. Or when he is in his bed, trying to fall asleep, and the same image causes him a strong fear that does not allow him to sleep throughout the night.