Quick question? How can she see the tenketsu? When they were first mentioned I'm sure she couldn't see them and it hasn't been said that she's improved her Byakugan enough to be able to see them...
she may not be able to see them, but I would expect the Hyuuga clan would have a chart of the human body showing all the tenketsu points, she may have felt herself hit them
oO_Oo