Short answer
No. Crying does not break the fast. Only if a large amount of tears runs into your mouth, enough that you taste the salt across your mouth, and you swallow it, does the Hanafi school count the fast as broken. A drop or two that reaches your lips has no effect.
Tears do not break the fast. If a drop or two enters the mouth and is swallowed, the fast is not affected. If many tears enter, so that their saltiness is felt in the whole mouth, and they are swallowed, the fast breaks with one day of qada. Sweat running into the mouth takes the same ruling.
The four schools agree on this.
Explanation
Crying is a natural response to grief, pain or emotion, and weeping out of love and fear of Allah is praised in the Quran. It has no effect on the fast in itself. Ramadan is a month when many people cry in dua, in taraweeh or when they hear the Quran, and that is something to be glad of.
The detail about tears in the mouth. The Hanafi books give a precise rule. A small amount, a drop or two, that reaches your lips and goes in with your saliva is too little to matter. A large amount, enough that you taste the salt throughout your mouth, is no longer a trace: if you swallow it, the fast is broken and you make up one day, with no kaffarah. Sweat running into the mouth is the same.
In practice, wipe your face, and spit out tears or sweat if a lot has gathered in your mouth. You do not need to worry about the occasional drop.
Crying from hunger or pain. If you are crying because illness makes the fast too hard, you may be excused from fasting. See skipping the fast when ill. Children who cry from hunger are not yet obliged to fast: see when children start fasting.
The other schools also do not count crying as something that breaks the fast.
The evidence
Quran, Surah Al-Israa 17:109
وَيَخِرُّونَ لِلْأَذْقَانِ يَبْكُونَ وَيَزِيدُهُمْ خُشُوعًۭا ۩ ﴿١٠٩﴾
And they fall upon their faces weeping, and the Qur'an increases them in humble submission.
Weeping out of humility before Allah is praised.
Where the ruling is recorded
- al-Fatawa al-Hindiyya, Kitab al-Sawm, chapter on what breaks the fast and what does not. Tears or sweat entering the mouth: a drop or two does not break the fast; a large amount whose saltiness is felt in the whole mouth, if swallowed, does.
Checked by our team. For a more accurate answer to your own situation, consult a scholar. Quran translation by Sahih International. Hadith Arabic from the standard editions of the six books and the Muwatta, with gradings as recorded there; the English is our own rendering. Spotted a mistake? Tell us.