3. Poor Oral Hygiene
A common cause of a metallic taste in the mouth is the lack of good oral hygiene. Not brushing your teeth regularly can lead to the build up of bacteria between teeth, on the tongue and the inside of the cheeks, resulting in a bad taste in the mouth. Long term poor oral hygiene can result in gum diseases such as gingivitis and periodontitis, which can further affect the sense of taste and threaten the overall health of your teeth. Similarly, loose or broken fillings provide space for bacteria to grow, altering the mouth taste. A regular visit to your dental practitioner can help prevent any problems.