Do I need mouthwash every day?
Quick answer
Mouthwash may help some people but does not replace brushing and interdental cleaning. Product choice and duration depend on the need. Children under six should not use it unless their dentist advises it.
Details
Choose a clear purpose
Some rinses deliver fluoride; others target plaque or odour. A cosmetic rinse may only freshen breath. Read instructions, do not swallow, and do not extend a prescribed therapeutic course indefinitely yourself.
Timing and cautions
Chlorhexidine can cause staining, so discuss its duration with your dentist. Avoid rinsing immediately after brushing because it can remove remaining toothpaste fluoride; choose another time and follow the product instructions. Persistent symptoms need investigation.
Related question: How can I prevent tooth decay?.
Note: This answer is for educational purposes and does not replace a consultation with a specialist who examines your case in person. Do not use it for self-diagnosis.