Create a calorie deficit through diet
Eat more protein
Reduce sugary drinks and ultra-processed foods
Increase daily physical activity
Do regular cardio exercise
Add strength training
Improve posture
Do neck and upper back exercises
Get enough sleep
Manage stress
Limit alcohol intake
Stay hydrated
Reduce overall body fat
Check for hormonal or medical causes if swelling is sudden or unusual
Consult a doctor if the neck fullness is persistent or painful