Will my fast be void if I have a small cut in my chin in the morning?
All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger. We ask Allah to exalt his mention as well as that of his family and all his companions.
The blood that comes out of a fasting person without his will does not break his fast, and it does not render his fasting void whether or not there was too much blood. There is no text which suggests that such blood necessitates breaking the fast, and analogy does not imply breaking the fast, it is like having a bleeding nose, or a cut that a fasting person is subjected to without his will. So all this does not make fasting void; this is the view of the Hanbali school.
Allah Knows best.