This is a common phenomenon following browlift surgery and should resolve 6 to 12 months following the procedure. If it distracting to your daily routine, you may consider a very low dose of a medication such as neurotin.
Itchiness in your scalp is most likely related to the browlift portion of your procedure. Typically, the scalp loses sensation for several months. Return of felling is usually heralded by strange sensations (known as paresthesias) or by itchiness. This is generally self limited in 3-12 months.