1) Exercise
To get relief from a neck spasm, interlock your fingers together at the back of your head and push your head back firmly against your head for 5 seconds then relax. With your hands still clasped, then your head forward just a little and again apply gentle pressure for about 10 seconds. Don't lean your head too far forward and stop if you feel any discomfort. Repeat this isometric exercise several times or more as needed.

Chiropractic

2) Stretching Exercises
Carefully, without forcing, bend your head to the right and hold this position for 10 seconds as though you were trying to bring your ear down to your shoulder. Now gently drop your head forward and roll it around to the left and do the same stretch on the left side. Next scrunch up your shoulders toward your head and hold this for 5 seconds before releasing. Repeat this whole sequence several times.

3) Chiropractic
Going to see a chiropractor has helped me a lot through the years. As with anything, a lot depends on the skill of the practitioner which means there are good chiropractors and not so good chiropractors. Find a good one. While this is not a home remedy, it is a good natural remedy for neck pain.

4) Kudzu
An herbal remedy used in Chinese medicine for neck pain is kudzu. Researchers have discovered that kudzu can lower inflammation by slowing the body’s inflammatory response. Its method of operation is similar to the hormone estrogen and it can be taken as a pill or a powder. Persons who have hormone-sensitive cancers or are taking an oral drug for diabetes should not take kudzu.

5) Menthol and Camphor
One of the most commonly used and very effective home remedy for neck pain is an analgesic which contains menthol and or camphor. Some versions may also contain Eucalyptus or capsaicin (the hot in peppers). My favorite is Tiger’s Balm. When these analgesics are applied to the skin and are rubbed in, they enhance the flow of blood and produce a cool or warm sensation that soothes and relaxes the area. The effect can be further amplified by putting some DMSO over the analgesic which will cause it to penetrate more deeply. You will have to purchase DMSO online and it has been used for decades as a topical treatment for muscle and joint pain.