Thanks for the query,
Dont worry bruise
at the site of puncture is common.
This happens due to extravasation of blood in surroundind tissue.
Slowly it will disappear.
she can use thrombophobe ointment for faster relief.
Please meet a dermatologist
for final diagnosis and treatment
Let me know if you have any other doubt.
you can ask a direct question to me on this forum, following the below link.
Wishing you a good health.