What triggers random anxiety and panic attacks when nothing is going on?

It's hard to say what exactly triggers them, but the mind is a little like a computer. It's always running processes - for the mind, thoughts - that we can't see and maybe know nothing about, so even when everything is still on the surface, our mind makes associations that we may not be aware of while they're happening. It only becomes apparent when we have a result, which is an anxiety or panic attack. This is what makes it a great idea to reeducate our minds so that we are more aware of these thoughts before they escalate and become harder to manage.

There are many theories floating out there as to why this happens. During my studies I believe it is all due in part by the sub conscious or cellular/muscular memory.

Its almost always the negative thoughts that trigger a past trauma or experience that was very painful. Other than that, it could also be caused by exxageration of the fear of failure in future by thinking too much about future. Guided Meditation is helpful. Chakra Meditation is really good. Inspiring quotes, focus on positive aspects of yourself, ways to improve self-worth can go a long way in saving one from anxiety and panic attacks.

A person doesn't always understand what triggers their panic attacks & not knowing makes them panic more. It's ok, just focus on what you need right now.

Distant Memories that you thought you forgot. Certain smells certain images. Things that you can't relate to but your brain seems to remember something traumatic and that causes a panic attack. Relapses of memories. All of these things you think that nothing he going on but really everything is going on

Lots of things can trigger - even something as simple as not getting enough sleep or feeling stressed.

In my experience, seeing something on TV or just simply over thinking. Sometimes, it can be a dream or even something that you read.

You could possibly think of something you forgot to do, like homework or study for a test. That's usually what triggers me. It is different for everyone.

There are many triggers for anxiety and panic attacks that seem to come from nowhere. Several types of neurological disorders and other illnesses can cause an attack without warning. In other cases, there may be stress over many little things that are building in your sub-conscious. Often you don't recognize them until they present as anxiety or panic attacks. I find that talking to someone about the things I'm dealing with gives me another person's perspective of whether there is a buildup of stress I'm not aware of that can appear as anxiety or panic.

I find that my anxiety and panic attacks are never random. Something has triggered those feelings and episodes even if they aren't obvious. It can be an event or interaction from a day or two ago that I didn't realize was rattling around in my head. It can something subtle or unconscious about my surrounding, like I sensed something dangerous without realizing it. Journaling has been useful for identifying these triggers as I can look back at patterns and really work out what might be happening.