1, when burning incense, there is a saying called "hand incense", which means that burning incense ashes indicates that good things (that is, incense) will "succeed". It means that your wish may come true, and it also means that you have a relationship with Buddha. You can do it as long as you are sincere.
2, when burning incense, there is wind incense ash burning to the hand. Sometimes pilgrims are burned to death because their houses are dirty or possessed by evil spirits. At this time, you need to find a master to check and solve it in time. Maybe it's because you said something you shouldn't have said and made a taboo.