Itchy spots only at night?

  So at night I get really itchy. There’s like, raised patches that resemble big mosquito bites. I don’t have them before I fall asleep, but when I wake up at night they’re there. And my head gets itchy too, and my face even though there are no bumps there.

  Even when it isn’t Summer I still get these. Mainly on my stomach and in my hair, but that’s all, really.

  Is this serious? Should I go see a doctor or  not? Usually I thought they were just ordinary mosquito bites until my mum told me that there were no mosquitoes ‘cuz it was winter at the time. Also, I often get these in areas my clothes have been, like my trousers waistline.