Ask Rachel anything Most teens go through a phase of being hyper-focused on looking good; whether it's clothes, bodybuilding, skin-care or makeup. What can seem like an obsession could be a normal part of the process, so when should we start to worry and how should we step up? When Clare wrote in worried about her daughter's skin-care regime she was hoping to get a teen perspective. Here's what she said. I would like you to advise on though and maybe your daughters can help? M…