Check the task that triggers it
Does discomfort build while reading small text, turning to another monitor or reaching for the mouse? Make the relevant adjustment: enlarge text, bring your main screen ahead or move the mouse closer.
OSHA recommends positioning equipment so your shoulders can stay relaxed and your arms remain near your body. The goal is a workable position, not holding yourself rigidly upright.
Keep movement comfortable
Change tasks and positions through the day. The NHS neck-pain guidance advises against keeping the neck still for long periods. If you try gentle movement, stop any motion that worsens pain.
Do not assume it is only posture
Neck symptoms can also follow injury or nerve irritation. Record where the discomfort travels and what makes it worse. Share that information with a clinician if symptoms persist, particularly when an arm feels numb, tingly or unusually cold.