Most likely just relocation stress ....
Maybe he/she's seeing the ghost beardie and it's stressing him out , paper sheeting at his/her line of sight will hide him/her from the ghost beardie (reflection that he/she thinks is stalking him/her).
Stress marks are not always an indication that beardie is upset, they can also often indicate beardie is alert .
is helpful for many Noob beardie keepers to review the husbandry and care (often the Noob is given very poor advise by the seller - this is especially common if it was a petshop).
A common mistake is cohabitation (if sharing tank or can see another beardie) , even if he can see another beardie , or a snake or very large lizard ?
Are there other pets (cats, dogs ) in the household ? The can be a problem and a danger.
And details of your feeding schedule and other husbandry aspects . Might be a very easy fix .
Photos of the tank and showing substrate and lighting and of the beardie will help too. Use XIMG button to upload photos from your computer.
How heavy is he beardies ? how old are you told he is ?
...... recommend weighing regularly (weekly say)?
Can you give us a good rundown on the setup and schedules (light and feeding) :
Basking light
........ is it a coloured globe ? (BAD)
........ what is it's wattage ?
........ how far from the basking spot ?
TEMPERATURES ?
>>> daytime
.......warm zone
.......basking spot
...... how are you measuring your temperatures ?
TOO COLD = SLEEPY DRAGON
>>> overnight minimum viv temperatures ?
UVA AND UVB ADEQUATE ?
>>> is the uv rated AT LEAST 10%UVB ?
>>> is it a COMPACT (curly globe & WATTAGE ?
>>> or a T8 tube ?
>>> or a T5 tube ?
>>> or an MVB ?
VERY IMPORTANT : what is the brand ?
(not all UVB compacts and tubes are created equal or as well , many shops sell their own brand (Zilla, All Living Things, Reptile-One, Nat Geo , Natural Selections (in green boxes) which are cheap Chinese clones made very cheaply using very poor quality quartz glass and cheap phosphors ==> very poor UV spectrum produced incl UVC band and bad parts of the UVB band)
>>> also is it covered (in a domestic fluorescent light fitting )? == BAD
>>> also is it sitting ontop a mesh top ? == BAD
>>> how far from basking spot ?
too far and the UVA and UVB WILL BE TOO DILUTE.
UVA FLUX TOO LOW where dragon is ==> a very lethargic dragon w/ a very poor apetite just in the short term , and neurological problems if this persists , not to mention MVB if UVB flux too low long enough with inadequate metabolisation of dietary calcium or inadequate intake out calcium
http://www.arcadia-reptile.com/wp-content/uploads/2012/04/guide-bearded-dragon.jpg
TANK
>>> size (L x W x H) and construction , photos of the setup are often helpful .
SUBSTRATE ?
>>> is it sand ? == BAD AND IF CALCISAND this is EXTREMELY BAD/LETHAL when ingested
>>> is it particulate ? == BAD
SHARING TANK ? == BAD
TOO SHORT A PHOTOPERIOD (lights are not kept on long enough each day , will make beardie think it is winter , recommend at least 14 HRS PER DAY)
FEEDING SCHEDULE (I recommend at least 2 hrs lights/heat on before first live feed and after last feed of the day)
>>> when are you offering live feeder insects ? what are they ? how big are they ?
>>> when are you offering greens and other veg ? what are you offering ?
good guide is here :
http://www.beautifuldragons.com/Nutritionframeset.html