Is a slightly strained neck a reason to worry?

No. Try to remember how you slightly sprained it and don’t do it again.

If correctly diagnosed, a neck sprain is relatively benign and physical therapy along with avoidance of activities that led to its onset should suffice.

If you are able to carry out your daily activities, it is not a cause for concern. Regular exercise will make your muscles strong and flexible and avoid future strains. For healthy diet: http://www.choosemyplate.gov/., exercise 30 minutes/day, drink enough water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs.