Hello. Thanks for writing to us at healthcaremagic
Acute
sunburn can be very discomforting. There is burning sensation, discomfort, redness and swelling as part of the inflammatory response to a sunburn. Swelling is due to the leakage of fluids from blood vessels into the tissues.
Since the skin around the eyes is lax and can accommodate, therefore the fluid that had leaked as part of sunburn has trickled down to the area around the eyes due to gravity.
If I was the treating doctor I would have started her on a short course of an oral
steroids for a week or so. Steroids are antiinflammatory and are rapidly effective in case of a sunburn.
Topically she may use a moderately potent
topical steroid e.g
fluticasone propionate 0.05% cream at the affected area.
Topical as well as oral steroids are prescription products, therefore, I would suggest that you talk to your doctor for the needful.
She may continue with symptomatic treatment with analgesics like
ibuprofen.
Regards