Why does my weight fluctuate so much?

Last reviewed
May 7, 2026
Reviewed by
Hazel Shore
Next review
May 8, 2025

Most people gauge their weight by stepping on the scale. While scales are easy to use and widely available, they don’t always tell the full story. If you’ve ever weighed yourself daily to track your progress and felt frustrated by the numbers going up and down like a yo-yo, you’re not alone- and you’re completely normal.

Have you ever eaten well, stayed hydrated, exercised consistently and still seen a weight increase? That’s because the scale isn’t showing the whole picture.

Weight is influenced by many factors beyond fat loss, including water retention, food and drink intake, digestion, bowel movements, muscle gain, hydration levels, sleep, stress, and medications. These fluctuations are a normal part of the body’s day-to-day processes.

That’s why expecting the scale to go down every single week (especially when you're actively trying to lose weight) is unrealistic. Overtime, your overall trend may decline, but individual data points can vary significantly. What matters most is staying consistent with your positive habits. Long-term behaviour change is what drives meaningful results.

**CRAIG TO UPDATE IMAGE AS THIS IS A SCREENSHOT CURRENTLY  **

Instead of focusing solely on the scale, direct your energy toward the things you can control: drinking plenty of fluids (2–3 litres per day), eating enough fibre to support digestion, managing stress, and getting quality rest. These habits support your overall well-being and weight management.

Finally, remember fluctuations are normal. Weigh your self once per week under consistent conditions and look at the broader trend. Avoid placing too much importance on daily or weekly shifts. Trust the process and stay consistent.

Need additional help with weight loss?

Created & reviewed by:
Hazel Shore
|
Obesity Specialist Dietitian
Last reviewed:
May 7, 2026
Next review:
May 8, 2025
Related articles
Phlo Clinic
Thinking of using our weight loss service?

Sign up to our newsletter to access our FREE GLP-1 Nutrition guide

Plus, get expert advice on how to fuel your body, feel your best, and set yourself up for success - all delivered straight to your inbox!