Generally, hiccups are caused by too much gas in the stomach. As the above experts said, pay attention to your diet and take some gastric motility drugs to improve it.
However, if you have chest tightness and burping for a long time, it is also a gastric neurosis, so if this is the case, you should go to the hospital to check and see what the chest tightness and burping are, and then carry out symptomatic treatment.