<s>[INST] Hi, this is sriram 24years of age . Freequently these days am having breething problem. At the time am not able to breath properly with nose and am taking breath through mouth. At that time I feel discomfort with my stomach as it expands. From the past two years am facing this issue. I get this problem mainly in winter nights. [/INST] Thanks for your question on Chat Doctor. I can understand your concern. Breathing from mouth is known to cause aerophobia (air in the stomach due to oral breathing). This is mostly due to blocked nose. You are having this problem only in winter months. So possibility of seasonal allergic rhinitis is more in your case. So better to consult ENT doctor and get done clinical examination of nose. You may need intranasal spray containing steroid during winter months. Oral combination of antihistamine and anti-allergic Chat Doctor.  Once you are able to breath through nose, your mouth breathing and stomach upset will resolve by its own. Don't worry, you will be alright. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks. </s>