Hi Mrs Talat Syed.
I appreciate your concern for your daughter,
Capillary malformations commonly referred to as port wine stain
is commonest type of vascular malformation
. which sometimes is associated with other abnormalities as well.but in your case there is no involvement which is very good.
Regarding treatment PDL(flashlamp pumped pulsed dry laser
)surgery is the treatment of choice.
I advise you to consult pediatric dermatologist
or laser specialist for evaluation and intervention.
Wishing your daughter good health.