3 weeks ago had brain surgery and the neoplasma benignum hypophyseos removed. now when she walks i hear ticking noise from head.is it normal?

Ask your surgeon now: Your question indicates that you had a very, very specific surgery for a very, very specific condition, and there is no substitute for discussing your situation and asking your question of the surgeon's office. The surgeon should know what specific procedure was done and where it was done and what would be "normal" to expect afterwards. Unexpected results may require emergency treatment.