Breathing with your mouth open? What can it cause?

hi there......watever ur dentist told u is tru...tissues be dry n they bleed easily if u dont have jaw problem due to wich ur forced to breathe frm ur mouth while sleeping then their may be adenoids or ne other throat infection due to wich u breathe from mouth i wud advice u to go for proper physcian check up..........because jaw related problem can at times b ignored bt nt other infection.so go for the check up once .may b sum day u ned orthodontic coreection bt only if it is related to jaws or teeth.so get urslf xaminee d first.....gud luk/........