Urine infection is the cause of swelling, due to infection  urine flow is not adequate  so water retention  is there .leading to  edema below your eyes, consult online on video call.

May be due to the high blood pressure,record morning ,take liquid suppliments avoid salt

Any fever Get ECG and echo It may be bks of urine infection also Get her urine  culture sensitivity  and consult online Check her blood pressure Start medication for uric acid

Kindly share the report , that will be more useful in guiding you. Swelling over face is a sign of renal insufficiency. Other common causes are inflammatory causes mostly . Is there any other associated symptoms Does ur mother had a history of diabetes or hypertension . Feel free to consult with detail history and report for further guidance and management

Kindler get her test done like thyroidsugar . Then Vitals . It is imp to rule our cause