One side of neck bigger then other

Hi im a 16 year old male with anxiety i noticed that the whole left side of my neck is bigger than the righti have found  no lumps/growths on eighter side. i have no pain in my neck and i dont find trouble moving my head side to side. Could it be that my muscles are growing differently or would it be something else? 

When u move head are you raising a shoulder look in mirror also tip head l r

looks like you are using one side is spine straight or hips level

ever fallen off a bike or had neck whip lash

my shoulders do not raise when i move my head and yes i have had been in a car crash when i was 4 also i have fallen and hit my head on the ground a few times when i was younger 

Go and see an osteopath

Yep Gillian is right get it checked by someone is best. Try to self diagnose is not a good idea, you end up worrying about loads of things if you do

Of course go to gp if you want a diagnosis but it's osteopaths chiropractor that can realignment

I've had this my son had it after a car crash nothing to worry about I very much doubt you have anything to worry about

Thank you for all the help it really helped my anxiety and knowing that it is nothing to worrie about. 

Sometime reassurance is the key to relaxing