Lines that are seen on the forehead, straight horizontal lines are called forehead lines. These are usually seen when a person tries to raise the eyebrows. They are not seen in younger individuals. They only get more pronounced with age. Men like these lines as it makes the face look rugged. Women do not like these lines as they portray a certain age. Forehead lines should only be reduced and not made to disappear. A plain forehead with no lines does look unnatural. Botulinum toxin injections need to be given very cautiously in miniscule amounts to treat the forehead lines.