Will fine hair increase the possible risks associated to hairline lowering? (Photo)

No, fine hair will not cause more risk of hair loss after surgery. However if you do have hair loss after surgery, then fine hair will make it look worse.

 If your hairline is high you need hairline lowering done by a very experienced surgeon. He should be familiar with the Irregular Trichophytic Hairline Lowering  procedure which we develop 35 years ago.  Hair will grow through the scar and not behind. Look at the surgeons close-up views of the hairline to make sure you do not end up with a noticeable scar. Fine hairs will cause no problem.

DearPucku, Is it the fine hair in the front that you posted in the past or is your concern for having fine caliber hairs but apparent good density? The fine front hairs can sometimes be removed in this operation bringing the more dense hairs to be the new hairline . It would be extremely unlikely for any permanent hair loss to occur in one who has had no prior scalp or forehead surgery or any prior hair loss. Whatever the case, You should find out if you, indeed, are a candidate for this surgery by having a consultation with a surgeon who frequently performs this procedure.The blood supply to the scalp recovers after this operation but it is not the same as it was before. The same goes for hair transplantation. 

Fine hairs always exist at the leading edge of any normal hairline; however, if you are thinning behind that hairline, then a surgical hairline lowering procedure is probably not the best choice for a procedure. The alternative hair transplant lowering procedure is a much better choice for women who want their forehead reduced and have thinning hair behind the leading edge. The hair transplants can not only move the hairline down, but it can fill in the thinning area and make it thicker.  See web reference below