Heat also can Arctic Blast help decrease overall pain, and most people's first inclination is to use heat therapy. However, heat should more often be used when you have a chronic condition. Heat helps increase circulation and loosen muscles. This can increase mobility and help toxins leave the area and allow helpful nutrients to get in.
Similar to ice, heat will relax the area, reducing pain. So, as a general rule use ice when you initially injure or reinjure your neck. Use heat when you have a chronic neck ache or have tightness or stiffness.