Brief Answer:
Read below.

Detailed Answer:
I read your question carefully and I understand your concern.

Drooling can often be a normal phenomenon in many people, so in itself if there are no other associated phenomena, no seizure manifestations, may not be that significant.

Persistent night sweats on the other hand may be a manifestation of several symptoms and requires some attention, particularly if there are other symptoms such as weight loss. It may be a manifestation of some infections (TBC, brucellosis etc), some blood malignancies like lymphoma, elevated thyroid function, sleep apnea etc.

So to screen for some of those conditions a general physical exam by your primary physician and some routine blood tests are recommended, like blood count (for changes of white blood cells due to infection or lymphoma), inflammation markers (ESR, CRP), thyroid function, blood glucose. A sking test for tuberculosis may be considered. If there is a history of snoring overnight and daytime sleepiness then sleep studies (polysomnography - recording of brain activity during sleep through electrodes on the scalp) to check for obstructive sleep apnea (which may be associated with drooling as well).

I remain at your disposal for other questions.

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