There are a number of reasons and conditions that can cause bumps on on the forehead. Fortunately, most of these are benign. If it is a bony bump, there is a procedure to shave these pumps to create a smoother for it. A good consultation by your plastic surgeon should be able to yield a number...
You need an examination of your scalp and understanding of risks with realistic goals/expectations.
One risk is that forehead reduction surgery leaves a scar on the hairline no matter which surgeon or type of surgery performed. If you have genetic balding this scar will be highly visible years...
Your hairline could likely be lowered 2cm which would reduce the height of your forehead about 30%. Draw a line with an eyebrow pencil where you would like your hairline and see how much lower it is than now. Computer imaging can be done to see if the smaller forehead really flatters your...