This is completely normal to have swelling after the filler along with bruising too. Sometimes the bumps come from not evenly spreading out the product when its injected. You also can have your doctor use the reversal hyaluronidase/Vitrase to dissolve the product from under the eyes....
Hives are not generally a result of fillers injected especially months later. Hives are generally the result of a virus or an allergic reaction. Please consult a board certified dermatologist to find out the cause of the hives. You can also have skin tests to determine if you are allergic to...
For unique cases where a variety of modalities could be used to treat the condition, I would suggest an in-person or virtual consultation to develop a custom and effective treatment plan. It is difficult to precisely define the best option without collecting the same information. I suggest...