Pimple Under My Tongue. Oral thrush or oral candidiasis a yeast infection can also cause pimples on tongue. These usually disappear especially when the infection goes away.

These comes up especially when the fungiform papillae. These are the tiny. Usually one at a time approx 1-2mm in diameter afrer days it turns into an ulcer.
Bumps from oral herpes are usually a cluster of small yellow or clear bumps on the tip of the tongue.
This could be a lie bump especially if it appears at the tip. Transient lingual papillitis also known also as lie bumps is a temporary inflammation of the tongues papillae. Usually one at a time approx 1-2mm in diameter afrer days it turns into an ulcer. Lie bumps are tiny bumps located on the tongues upper surface.