If it is too hot, it is difficult to breathe. What should I do?

According to your description. In hot weather, I feel chest tightness and difficulty breathing. The situation suggests that you go to the hospital for examination as soon as possible.

Guiding opinions:

Don't be afraid in this case. It should be caused by the hot weather. You can take your blood pressure when you have another attack. Pay attention to drink plenty of water and don't eat spicy food.