Hi, my sister has been staying with me this week and has been coming home saying the tips of her fingers are numb and when I look her fingers are white and there’s a clear line near the bottom where they turn red. It doesn’t matter if she’s been outside for 30 minutes or 30 seconds and wearing gloves doesn’t seem to have an effect. Is this something I should talk to a doctor about now or wait till next week when her mum gets back?