Maintain a calorie deficit
Eat more lean protein
Reduce sugary drinks and ultra-processed foods
Increase daily physical activity
Do regular cardio exercise
Add strength training
Improve posture
Perform neck and upper back exercises
Stay hydrated
Get enough sleep
Manage stress
Limit alcohol intake
Avoid smoking
Check for thyroid or hormonal issues if swelling is sudden or unusual
Consult a healthcare professional if neck fullness is persistent or painful