I am 26 years old. From past 4-5 days, my neck is stiff not too much but I feel kind of heaviness and tightness in my neck. It irritates me the whole day. I am not comfortable with it. As per my experience, it could be because of my bad sleeping style. I do not feel comfortable with my neck while sleeping because of bad sleeping posture. I am a restless person while sleeping. What should I do now to get rid of this heaviness stiffness tightness in my neck?