Dry mouth is a common symptom during the first trimester, often becoming more severe at night [1, 2, 3]. It is usually accompanied by dry, stuffy nose, chapped lips, headaches, hot flashes, indigestion, and metal cotton mouth (bitter, metallic taste in the mouth). In some cases, the tongue may turn pale white that is more apparent when you wake up in the morning [4, 10].
Since saliva helps in eliminating food debris from the mouth, its low production boosts the growth of oral bacteria, resulting in bad breath as well as tooth and gum infection [1, 3, 4]. Maintaining good oral hygiene provides protection from such conditions. Here are some tips to help treat and manage the problem:
Since hormonal changes contribute to dryness in the mouth, in most women it usually goes away after childbirth.
Besides the symptoms of dry mouth and extreme thirst, if you are experiencing fatigue, nausea, vomiting , extremely frequent urination , dizziness and diarrhea  that refuses to go away, then get in touch with your physician [1, 6,8] as it might indicate gestational diabetes.
A blood glucose test is performed routinely during the second trimester of pregnancy (between 24 and 28 weeks) to detect the complication . In case, you have a history of gestational diabetes your doctor might recommend getting the test done between 16 weeks and 18 weeks .
The ICD-9 code for RLS is 527.7  while its ICD-10 code is K11.7  and R68.2 .