A part of my scalp hurts whenever i touch it very slightly. like a tenderness. what is it and is this something bad?

Need more info: Hypersensitive scalp can be due to many things from infections to a pinched nerve in your neck, to wearing a hairdo that is too tight (think tight pony tail, for example). Without more information it's hard to say exactly what's causing your problem, but i doubt it's something serious, especially if it's been ongoing for a long time.