Can using too much non-alcoholic mouthwash following a tongue piercing cause irritation and gum sores?

Mouthwash: Only if you are allergic to something in the mouthwash or possibly to the piercing of your tongue maybe the implant is irritating your gum every time it hits against the gums.

Gum issues: Please consider removing your tongue bar. They are notorious for causing gum damage, such as, gum recession and tooth problems, such as, cracked teeths. This can lead to treatment that can otherwise be prevented. Please think about it.

May be both: The prolonged and excessive use of mouth wash, can alter the bacterial flora of the mouth causing the ulceration , and the presence of tongue jewelry also contribute to the inflammation and ultimately ulceration s