How do I tell my parents that I suffer from panic attacks?

It can be difficult to tell people you love that you're experiencing something like panic attacks, especially when you don't know how they'll respond. If you feel that it is safe for you to do so, I'd recommend finding a good time to talk and then explaining to them what panic attacks look like for you and when you've been having them. If there are any things that you think they could do to help you before, during, or after a panic attack (like giving you space or helping you stay grounded), be sure to let them know about this as well.

You calmly approach them and tell them the situation you were placed in that made you have a panic attack and ask them for help

Tell them that you had a malaise and explain that it was due to the crowd/a thought/(anything that makes you anxious). They should be alarmed about it and see it as a true disease.

Talking about things such as panic attacks with people close to you can feel very daunting, especially if you feel like their response might not be very helpful. It may be important to prepare and organize your thoughts before sitting down and having this discussion with your parents, such as by writing down or typing it and making sure it clearly states everything you wish to address. You may want to make sure you will be safe after discussing this with your parents, as not everyone may react well to the news. You may also want to refrain from blaming anyone or anything in particular, and instead neutrally discuss the triggers for your panic attacks.