The fasting person is not affected if pus comes out of his wounds and that does not break his fast.

Emission of madhiy does not break the fast according to the more correct of the two scholarly opinions whether that is because of kissing one's wife, watching movies, or other things that provoke desire.

There is strong evidence for the view that the one who eats or drinks after Fajr or sunrise by mistake, his fast is valid and he does not have to make it up. However, it is better for him to fast a day later.

The fast of one who has intercourse with his wife at night and wakes up in the morning in a state of janabah (major ritual impurity) is still valid. For more, please see the detailed answer.

If a man falls into a coma in Ramadan for the entire day – i.e., from dawn until sunset – his fast is not valid, and he has to make up the fasts he missed. If he was awake for part of the day, then his fast is valid.

The majority are of the view that the fast is invalidated by deliberately looking until one ejaculates. For more, please see the detailed answer.

The fast of one who commits a major sin – such as buying shares in a riba-based bank is valid but is imperfect, and he may not attain the reward of fasting.

The fasting person is enjoined to fear Allah and to do what He has commanded, and to avoid what He has forbidden. Talking to the opposite gender does not break the fast but it takes away from the reward of fasting.