Sudden onset sweating

Hello~~ This question is to help maybe get a better understanding f what is going on with my father. My father is 71 overall health is good. No high blood pressure no heart attacks, no cancer or other major medical issues. However for the past 4 years or so my father has developed this sudden onset of sweating. Doesn't matter if it is cool or not, sitting or walking, sleeping or awake. All of a sudden he begins to heat up and sweat. Sweating is all over, mostly forehead and body. When this comes on he is not out of breath, no chest pains, no dizzyness or weakness. His thyroid is normal too.
Any guide in what to ask doctors to check him for?

[Cleveland Clinic]

Unlikely to be related to heart condition, this may be a manifestation of recurrence of tuberculosis or lymphoma, especially Hodkin's disease. Has he had a PPD and or routine blood tests and a physical exam to address these issues?

[chrstnp]

A related discussion, onset sweating in men was started.