From the information you have, considering that your daughter has partial venous reflux of lower limbs, it may be caused by venous valve insufficiency.

First of all, I suggest you go to the local hospital for an anterograde and retrograde angiography of deep veins of lower limbs.

Determine the degree of deep venous reflux. If it is 0-2 degree reflux, you can temporarily ignore the surgical treatment, and you can wear elastic socks and other symptomatic treatment.

If the reflux reaches 3-4 degrees, surgery is necessary, and deep vein valvuloplasty can be done.

The surgical method chosen in our hospital is ligation of deep femoral vein.

(Dr. Ouyang Yang from Xiangya Hospital solemnly reminds me that because I can't see the patient face to face, I can't fully understand the condition. The above suggestions are for reference only. Please go to the hospital for specific diagnosis and treatment under the guidance of a doctor! )