Oh my .... that looks very sore and she'll be feeling pretty crook too .... definitely get her to see an experienced reptile vet RIGHT AWAY .... this wont have blown up like that o/night , it's likely taken a few weeks or months to get so swollen , so , please don't delay getting her to the vet to be examined , get bloodwork, a swab cultured, small needle aspiration taken to examine what's in there.
At least she's not
black bearding ( in your photos ). That's a positive sign .
Could be :
>> result of an aneurism = very serious and life threatening if left untreated (likely needs surgery and a blood transfer) .... if it is an aneurism the prognosis is bad , as is the potential of death through complications during surgery and recovery , VERY GOOD IDEA to arrange some blood taken from her which is cleaned (to remove any pathogens and stored) to ensure the vet has blood on hand to replace blood loss during surgery (which would be extreme in the case of such a large lump).
BUT : since you say she's had a swollen eye most her life, it's probably not an aneurism, she would have been dead from it a long time ago. A certain expert on bearded dragon aneurisms who teaches vets in the USA told me my Puff's lump was unlikely to be an aneurism as he'd had his for about 4 - 6 months (started small and slowly grew and then effected one of his eyes and that side of his mouth) and she told he would have been dead very soon after the aneurism occurred. (Even world experts get it wrong).
MORE LIKELY
>> an abscess , again serious and potentially life threatening and requires draining (surgery) and infected tissues removed and a long cause of antibiotic , the surgery is risky.
>> an cancerous growth , again serious and lifethreatening and requires surgery and continuing vet treatment to ensure no regrowth.
>> blocked tearduct , serious but not lifethreatening and will not clearup without a vets surgical intervention
The longer you hold off the worse this will become and the costs for surgery and treatment will snowball very fast.
I recently has a similar issue with one on my beardies (Puff) , who had a soft lump growing on the back of his head , and developed inflamed lips and a very swollen eye which he made worse when one day when I think he was shaking his head vigorously and wacked it very hard on the edge of his acrylic stone grotto giving himself a very serious eye injury and a very nasty shiner. In his case it was fluid buildup the tissues in the side of his face and eyesocket that originally caused his eye to become very swollen, this was due to an aneurism on his jugular vein which was misdiagnosed as a being an abscess (even when the vet surgeon took a small needle aspiration of the contents of the lump on his head.
I spent about $800 on major surgery to remove and treat what I was told was an abscess but suspected right along was an aneurism, and my much loved spoilt big boy never regained consciousness - dying in recovery from a heart attack (due to excess blood loss in surgery)
The vet was planning to deal with his inflamed , damaged eye surgically in a few months once he was strong enough to go through another major surgical procedure , and I was sent home without him (he was too frail to come home and was in intensive care (likely overnight was the expectation) and I had the antibiuotics injections and pain relief sent home with me in preparation for his return home .
THIS IS SERIOUS.
I hope your beardie's swollen eye is not one of the bad ones (above) , and really hope your vet can treat it successfully and save her life (this is most likely lifethreatening) , even if the eye is not salvageable.
Good luck.