What are 3 types of panic attacks?

There are three types of panic attacks, which include:

1. Unexpected panic attacks: These occur suddenly without any apparent trigger or warning signs. They can happen at any time, including during sleep.
2. Situational panic attacks: These occur in response to a specific trigger or situation, such as being in a crowded place, driving on a highway, or giving a speech in public.
3. Expected panic attacks: These occur in anticipation of a specific trigger or situation, such as the fear of flying or going to the dentist.