Hi, my mother had breast cancer and she had mastectomy on her right breast. She is ongoing with chemo sessions but she has a history of identifying veins to insert needles. She has restriction of having chemo only on left hand and she has gone through 8 sessions. She is very scared of the needle insertion into her hand and the process getting very painful as her veins thinned and nurses not able to find veins and they are trying it many times by inserting the needle. Is there any spray or cream available as anesthetic to apply before inserting chemo needle so that she don't have to go through pain while finding nerves in her hand. Please advice also if using cream and spray is safe for her before chemo.