How can I tell someone that I'm having a panic attack, if I feel that I can not breathe or calm and neither talk?

Try to tell people in advance that you have panic disorder, explain what it looks like so they will know and you don't need to say a word!

You just have to say it with the little voice you have. During a panic attack the only thing you can do is breath in and out in a slowly way, also if this is hard.

From my experience, if it's to that point, communication just isn't possible. You however can communicate what happened afterwards so the person has more of a clue what to look for next time to know what's going on.

It may be a good idea to let your closest friends know that you have panic attacks to begin with. That way, when one does occur, they'll know what to look for and how to help. It's good to discuss these things with the people closest to you; they can be a huge help if and when you do have the dreaded panic attack. Sometimes you can even feel it coming on and have enough time to give a small warning. I think if you look your friend straight in the eye during your attack, the look in your eyes will tell it all. If you've had the talk before, they should guess what's going on and hopefully be able to calmly talk you through it and get you breathing deeply again.

If you need help dont be shy go tap someone on the shoulder and do your best to show them with your facial features.

try to grab a pen and piece of paper or use your phone/tablet/computer to type it to let someone know without speaking

In my experience, its a good thing to find out what situations give you panic attacks. Because if you have a friend or someone you know in these situations you can create a way of awaring them without having to say it, like a wave or some signal.

It's usually fairly easy for someone to recognise the signs of a panic attack, but if not for your friends/family pre-warn them of the signs and what to do if you are having a panic attack.

You should tell someone you are prone to panic attacks and make them aware of the signs that you might be having a panic attack.