Could you explain why do i always have bad breath?

See your dentist: There are multiple causes of bad breath so you need a doctor to help you find the reason it can be from gum disease, cavities. Plaque buildup, poor oral hygiene, sinus problems, stomach problems, medications, periodontal disease have it checked out.

I'm not sure.: Bad breath may be caused by smoking, dry mouth (due to medications, ^ mouth breathing or salivary gland problems), gum infections, poor dental hygiene, certain foods (like garlic, curry, fish oils or onions), sinusitis, post nasal drip, throat infections, infections in the mouth, bronchitis, lactose intolerance, gerd, improperly cleaned dentures, braces ; retainers.See your dentist. If no dental>.