My advice - learnt the hard way - find an expert reptile surgeon - not just a hack vet who dabbles in reptiles.
See my thread about my Puff who I lost a few hours after surgery to drain and debride what the vet thought was an abscess but discovered was a huge aneurysm on his left jugular . Puff died due to severe blood loss in surgery while he was being kept in overnight in ICU under observation from what the vet claimed was heart failure ( due to low blood volume ) …. I believe incompetence
>> misdiagnosed ( I strongly suspected he had an aneurysm when I took him to them )
>> inexperience in dealing with bearded dragon aneurysms
>> never even suggested harvesting Puff's blood for storage over a month or so to have sufficient blood to transfuse him during the surgery ( they told me he had an abscess , despite my research indicating an aneurysm ).
Puff never lost his appetite.
Puff never behaved sick , even when he ruptured his left eye who's eyesocket was very swollen ( fluid buildup due to the aneurysm ) , irritated him and he bashed it in hard corner of his fake grotto .
Get on top of this ASAP , it wont go away by itself .
Be aware , the prognosis is not flash , unless the reptile surgeon is very experienced.
Be aware , there is a strong likelihood of future aneurysms for him for the rest of his life .
Be aware , it's wise to keep his stress level low while he has an aneurysm else he is a risk of a fatal stroke.