Swollen lymph nodes in groin armpit and neck allare under a cm in diameter. also all have been examined by doctor they are very movable.should i worry?

Maybe: It could be a viral illness or worst case lymphoma. Small possibility it is benign, as long as your doctor is following you he will decide if you need further work up with biopsy.

No, don't worry!: Lymph nodes are present in everyone, and they are normally under one centimeter in size and moveable. In young people like you, they are often more easily felt. This can be because you're thinner, and because your immune system is more active. So don't worry! the picture shows lymph vessels and lymph nodes in green.

Dr Diede agreed

Worry enough: To have followup and biopsy if changing or enlarging. Small palpable, mobile, non tender nodes are not uncommon, and easy to feel in thin youths.