I am having tingling/some numbness in half of my tongue (the left) along with some ear and jaw pain. have chronic sinusitis. what can this be?

Numbness: Tongue numbness, ear ; jaw pain, and sinusitis---all may be related, or may be coincidental. One-sided numbness should be examined carefully. First, see a medical doctor to rule out any conditions that require medical attention. If you are fine, but still with above symptoms, consult with oral surgeons and/or dentist with tmd training. Bad bite, hormonal changes, neuralgia, etc., maybe related.

Troubling: Troubling symptoms. See oral surgeon or ENT doc ASAP for exam.