Complex sentence: On blogs and in Internet forums, thousands of people claim to have trypophobia, and, if the fear is excessive, persistent, and associated with significant distress or impairment, it could fall under the broad category of specific phobia.
Split into simpler sentences: On blogs and in Internet forums, thousands of people claim to have trypophobia. If the fear is excessive, persistent, and associated with significant distress or impairment, it could fall under the broad category of specific phobia.