Bad breath problem mainly in summer.asthma and tuberculosis tests are negative. my doctor says that i have dust allergies. please advise me.

Bad breath: You might be developing something known as tonsiliths which can contribute to chronic bad breath. Consider seeing an ear, nose and throat or a dentist.

Bad breath: Halitosis (bad breath) may be a symptom of chronic sinus infection or even acid reflux. Allergic rhinitis with post nasal discharge and mouth breathing from nasal congestion could lead to bad breath more likely year round. Treatment for dust mite allergy should be confirmed and if present treated. If halitosis resolves, then that was the reason.