Hello sir, since i have shifted from india to saudi arabia, i am constantly having difficulty in breathing and dry mouthn while sleeping. please advis?

Mouth-breathing: Dry mouth comes from nighttime mouth-breathing. Are you having allergy symptoms like cough, sneeze, eye irritation and itching, stuffy nose? It would be a good idea to see a local physician to help you figure out your difficulty breathing. Is it difficult through your nose? Is it asthma? Do you smoke? Do you snore and have sleep apnea with daytime drowsiness? A doctor needs to talk to and examine.

Probably not related: While Saudi Arabian climate can be daunting to any recent arrival to cause physical discomfort before acclimatizing, for on going problems in falling asleep, pl get yourself checked for any sleep disturbance which can cause long term adverse effects on your health.