First off - you need to identify where the buzzing occurs - open string, fretted at the fifth, seventh, third fret etc. What type of instrument is it: floating bridge or pin style, type and guage of strings? There are a lot of variables and it's really difficult to isolate a problem without seeing or having more understanding of the type of instrument.
Frank Ford's remarkable web site www.frets.com has several illustrated articles on identifying and remedying buzzes. (Sorry I can't pull the actual URL at this time.)
Mandola fever is permanent.
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