Parotid/salivary gland swelling and pain

i have an impaired immune system and have been a post-covid long hauler for almost 3 years tho my symptoms are manageable and not very severe; however, it seems i'm prone to parotid gland painful swelling that distorts right side of face up to ear but a round of antibiotics usually resolves these issues. i haven't seen too many long haulers write about this symptom and i'm wondering if any of you are dealing with this. my google research says it's immune system and bacteria related so i'm assuming the original covid virus is still in my body. will any of us be totally cured????