How old is he? It definitely sounds like he could be going through "beardie puberty" right about now. If so, it's a phase he'll grow out of.
Otherwise, some answers to questions about his care would be helpful (see below).
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GENERAL INFO
How old is your dragon?
How long have you had your dragon?
How long is your dragon?
What is the sex of your dragon?
ENCLOSURE INFO
What size enclosure do you have your dragon in?
What type of substrate do you have on the bottom of your tank?
Does your dragon share an enclosure with another dragon?
UVB INFO
Do you use UVB lights?
(If the answer is no, go buy a Reptisun 10.0 T5HO (US/CA) or Arcadia 12% UVB (UK/EU) tube bulb and reflector the length of your tank before answering the questions below.)
Is your
UVB bulb a coil, compact, fluorescent tube, or Mercury Vapor bulb (MVB)?
What is the brand name and number of your bulb?
What is the wattage (if MVB)?
How old is your
UVB bulb, if you have one?
How close can your dragon get to the UVB?
LIGHTING & HEATING INFO
Do you use a separate basking bulb?
What kind, and what is the wattage?
What are the basking temps?
What is the cool side temp?
Do you take the temps with a stick on thermometer, a digital thermometer with a wire and a probe end or a temp gun?
Where exactly are you taking your basking temps?
Do you use a heat rock or heat pad?
FEEDING INFO
What do you feed your dragon?
Please be specific.
How often do you feed and what time do you feed (morning, afternoon, night)?
Do you gutload (feed) your crickets, worms, etc?
Do you use vitamin or calcium supplements? What brand(s)?
How many days a week do you use each of them?
OTHER INFO
Is your dragon having regular bowel movements (poops)?
Do you
bathe your dragon? If so, how often?
Do you mist your dragon or offer water other than in the
bath?
Have you gotten a vet check and fecal done?