It is allowed to brush our teeth when fasting with or without tooth paste? If not, how do you get rid of bad breath so people are not uncomfortable around us? Please keep in mind I am not talking about siwak (tooth stick).
بسم الله الرحمن الرحيم
There is no harm if one brushes the teeth without paste. However it is makrooh to brush with paste during fast. If the particles of the paste enter inside then fast shall break. Hence one should avoid using brush with paste in the state of sawm.
Allah knows Best!
Darul Uloom Deoband