Simplify the following text for a Grade 9 native English-speaking person.
Original: However , panic attacks can be as short as 1 â `` 5 minutes , while sometimes panic attacks may form a cyclic series of episodes , lasting for an extended period , sometimes hours . Often those afflicted will experience significant anticipatory anxiety and limited symptom attacks in between attacks , in situations where attacks have previously occurred , and in situations where they feel `` trapped '' .
Simplified: Many people being treated for panic attacks begin to experience limited symptom attacks .