A female ghost's head flies out with internal organs to harm people. What movie? It's quite old. It seems to be from Thailand.

One sunny night, a filial daughter burned incense in the back garden and prayed to heaven. Unexpectedly, a spirit snake who practiced for thousands of years took a fancy to the beauty of the filial daughter, so she became human, forced her to marry, and secretly poisoned the filial daughter, making her become a flying witch every night and feeding on human blood. Finally, a monk appeared, wiped out the Millennium snake demon, and saved everyone a great harm. ..............