A Muslim must be mindful of those around him and avoid causing even the slightest inconvenience to anyone. A common problem experienced in Ramadan is excessive burping in Salah, especially in Taraweeh. The odour that emanates from the mouth causes inconvenience and is offensive to other Musallees.
Abdullah bin Umar (RA) narrates: “Once a person burped in the presence of Rasulullah r. Rasulullah (Sallallahu Alaihi Wasallam) said to him: 'Do not burp near us, for verily the people that are most satiated in this world will be the most hungry on the day of Qiyamah.'” (Tirmizi & Ibnu Majah)
Hence, it is Mustahab to cover the mouth with the hand when a person yawns or burps. (Ad Durrul Mandood). Please keep this in mind.
Eating moderately also assists in controlling the burping problem.