Hi, I'm an 18 year old female, I've developed this symptom of this spiky thing that appears at different places such as my belly side of my back, it's not a pimple, it itches if I touch, it's not painful but I'm just really scared and worried because I have no idea what it is, I also can describe it as a 'needle' like feeling, mostly appearing on my back, it sorts of fades out after a few days...thank you for your response