Healthy or not: Lymph glands ("nodes") draining infected areas enlarge because they are the battleground between the immune system and invaders and special immune cells are growing. If brief, it's nothing to worry about. Enlargement of an endocrine (like thyroid or adrenal) or exocrine (like salivary) is often a sign of illness.
Answered 3/7/2013
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Which glands?: Glands can swell because of infection or inflammation (some people refer to lymph nodes and tonsils as "glands") or because of local obstruction of their drainage (as in the salivary glands). So the best answer would depend on to which gland you are referring.
Answered 12/6/2015
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