It is indeed unfortunate for your daughter to have had a fall and an injury. It looks like she has developed a hematoma
as a result of the fall ( hematoma is due to accumalation of blood clot due to rupture of a tiny blood vessel in the skin/subcutaneous tissue
). It usually subsides within 1-2 weeks gradually, sometimes changing color from dark purple to greenish before it completely disappears. You can continue with the ice packs for 24-48 hours. If she is in good health otherwise then you may just keep an eye on the bruise
. Look out for any signs of loss of consciousness
, convulsions as is advised following any head injury
within 24 hours. If she is fine in these 24 hours ( performing all the routine chores) then she should be absolutely fine.