due to friction, crater like patch has occured on face

hi due to massaging restylane(on face) i had injected a crater like patch has occured an lots of redness, i t looks like a litle of the overlying skin is missing? what can i do? and will this leave scar? thank you

[Dr_Aparna]

Hi,
Restylane is a gel of hyaluronic acid produced by bacteria and used for treating facial wrinkles and folds. Hyaluronic acid is a substance that is normally produced by the body. Hyaluronic acid is what gives skin its volume and fullness. The hyaluronic acid in Restylane is called non-animal stabilized hyaluronic acid (NASHA) because it is not derived from animal sources. When Restylane is injected into wrinkled skin it adds fullness and reduces the prominence of the wrinkles in the previously wrinkled area. Hyaluronic acid also attracts and binds water, and this also helps maintain fullness in the area of injection. The benefit of hyaluronic acid may last for six months or longer. Restylane was approved by the FDA in December, 2003.
The most common side effects of hyaluronic acid are reactions at the site of injection such as bruising, redness, pain, itching, tenderness and swelling.
Post marketing adverse effects that have been reported include infection, allergic reactions, necrosis (death of tissue), and acne.
ref:http://www.medicinenet.com/hyaluronic_acid/article.htm
You have not got it  injected  correctly or it could be due to one of the side-effects mentioned where the crater has been caused by the death of the tissue in the area of injection.
You will have to get it examined by a dermatologist/plastic surgeon to suggest measures to restore tissue in the area.