People who study medicine and psychology enter!

It's phobia. I think your problem can be solved by systematic desensitization or shock therapy. System desensitization means that you try to get close to firecrackers first, and the closeness gradually increases. For example, you should watch others set off firecrackers at a distance that you just find unacceptable (don't cover your ears), then shorten the distance slowly when you can accept the distance, and then shorten the distance after each adaptation. The shortened distance can be set by yourself or by the person who supervises you (if you think you will give up, find someone you can trust and tell your situation. Systemic desensitization is generally effective, and your pain will not be great during the treatment, but it will take a long time, so you should be able to persist. There is also a kind of shock therapy, that is, you directly put yourself in the situation about firecrackers that you think is the most unacceptable until you get used to it. For example, you can force yourself to set off firecrackers for a day until you are no longer afraid. This kind of therapy is painful for you, but it is usually effective. But there are also some dangers, so you must tell the people you trust before moving on that if something happens, someone will come to save you.