Whether or not a blister can be broken needs to be determined on a case-by-case basis, and should not be broken haphazardly.
Oral blisters are related to many factors, do not pick, need to understand the cause of oral blisters to determine whether to pick. If the blisters are caused by trauma, the blisters are relatively small and generally do not need to be pierced, and will be absorbed later. If the blisters are large, they may be mucous gland cysts, which should be treated promptly and surgically removed by a specialized doctor.
If the blisters are caused by inflammation, don’t pick them, they may recur and become infected again, which may worsen the condition.
You need to pay attention to your oral cavity and consult a doctor if there is any abnormality.