When you needle the superficial and deep Masseter you will be going through the parotid gland and when you needle the medial pterygoid muscle inferiorly you will go through the submandibular gland. Intra-oral manual therapy can also address this particularly massaging and stretching the tongue using a 4X4 gauze pad to manipulate the tongue. This can have a effect not he sublingual gland. Feel free to email me at mark@integrativedryneedling.com and we can set up a zoom call do discuss in more detail if you find this helpful.