I just had hairline lowering surgery. My hair is falling out, leaving bald patches. Some hair is also very "wirey?" Shock loss?

One of the risks associated with forehead reduction surgery is hair loss.  It is usually temporary and will likely grow back over the course of a year.  You should see your doctor for a recheck.  It can take over a year for hairs to grow back.

How long ago was the procedure? Most likely this is temporary; both the loss and the wirey hair.  And it may take many months to return to normal.  

Hair loss following a hairline lowering procedure, like any facial pastic surgery is a known risk. Many times it does not come back. If you lost hair at the advancement edge, the scar will have to be covered with a hair transplant. Usually women lose hair in the corners of their hairline and this is almost always permanent so a hair transplant will also address this as well. Hairloss elsewhere my reflect a dermatologic problem whtich should be diagnosed,