The UK's most complete GLP-1 guide
Every Question Answered. Every Side Effect Explained.
- How GLP-1 medications work
- Mounjaro vs Wegovy compared
- Injection instructions
- Side effects & solutions
- What to eat on treatment
- FAQs answered
Free tracker included with every download this week
Does Weight Loss Help Sciatica Pain?
Yes, weight loss can help reduce sciatica pain in many people. Excess weight, particularly around the abdomen and lower back, increases pressure on the sciatic nerve and surrounding structures. By losing weight, you reduce this mechanical pressure, which may ease pain and improve mobility. The NHS recognises weight management as an important part of managing lower back pain and sciatica. Even a modest weight loss of 5–10% of your body weight can make a meaningful difference to symptoms.
10,000+ calculations today · NHS-aligned thresholds · 100% free
Calculate Your BMI Instantly
Enter your height and weight below. Supports both imperial (stone & lbs) and metric (kg). Results include NHS category, healthy weight range, and ethnicity adjustments.
What Is BMI and Why Does It Matter?
Body Mass Index (BMI) is the most widely used screening tool for assessing whether your weight falls within a healthy range. Used by the NHS, GPs, and weight management services across the UK, BMI provides a quick snapshot of your weight relative to your height. The formula is simple: your weight in kilograms divided by your height in metres squared (kg/m²).
While BMI isn't a perfect measure — it doesn't account for muscle mass, bone density, or fat distribution — it remains the standard first step in identifying potential weight-related health risks including type 2 diabetes, cardiovascular disease, high blood pressure, and certain cancers.
The NHS also recommends adjusted thresholds for people of South Asian, Chinese, or Black African heritage — a BMI of 23 or above is classified as overweight, and 27.5 as obese. Our calculator includes this adjustment as a one-click toggle.
How Weight Affects Sciatica and Nerve Pressure
The sciatic nerve is the longest nerve in your body, running from your lower back through your hips and down each leg. When excess weight — particularly stored around the abdomen and lower back — increases pressure on your spine and pelvis, it can compress or irritate the sciatic nerve, triggering pain, tingling, or numbness.
Being overweight increases stress on the lumbar spine and can contribute to:
- Disc herniation (where the soft centre of a spinal disc protrudes)
- Spinal stenosis (narrowing of the spinal canal)
- Poor posture and muscle imbalance
- Inflammation in the lower back
Weight management through a combination of healthy eating and physical activity can reduce this mechanical load. Use our free BMI calculator above to understand where your current weight sits and what a healthy weight range might be for your height. Even modest reductions in weight can improve symptoms significantly.
Clinically BackedWeight Loss
No appointments. No waiting rooms. Just care — from a UK-regulated online pharmacy.
How It Works
Three simple steps to understand your weight and take action.
Enter your height and weight in our free calculator. Get your BMI, NHS category, healthy weight range, and ethnicity-adjusted thresholds instantly.
If your BMI suggests you're overweight or obese, explore our GLP-1 calculators to project potential weight loss on Mounjaro or Wegovy.
Use our progress tracker to log your weight weekly, visualise your journey with charts, and stay motivated — all stored privately in your browser.
Free Weight Loss Tools & Guides
Everything you need to understand your weight, explore medication options, and track your progress — completely free.
Weight Loss Methods and Sciatica Relief
The most effective approaches combine dietary changes with gentle movement. The NHS recommends losing weight at a sustainable rate of 0.5–1 kg per week through a reduced-calorie diet (roughly 500 kcal deficit daily) and increased physical activity like walking, swimming, or physiotherapy exercises.
For eligible adults, prescription weight loss medication — such as GLP-1 injections — may be recommended by your GP as part of a comprehensive weight management programme. Our GLP-1 weight loss calculator can help you explore potential weight loss projections at different doses if your GP has suggested this route. Always combine weight loss with targeted back exercises and, if possible, physiotherapy to address sciatica directly.
Your GP can refer you to NHS weight loss services or a physiotherapist who specialises in lower back pain and sciatica. They can create a personalised plan combining weight management, exercise, and pain relief strategies tailored to your needs.
- Dual GIP/GLP-1 receptor agonist
- Up to 22.5% body weight loss (SURMOUNT-1)
- Weekly injection, dose escalation over 20+ weeks
- Available via private prescription in the UK
- Doses: 2.5mg → 5mg → 7.5mg → 10mg → 12.5mg → 15mg
- GLP-1 receptor agonist
- Up to 15–17% body weight loss (STEP trials)
- Weekly injection, 5-step dose escalation
- NHS & private prescription available
- Doses: 0.25mg → 0.5mg → 1mg → 1.7mg → 2.4mg
Mounjaro vs Wegovy: Head-to-Head
A side-by-side comparison of the two most popular GLP-1 weight loss medications available in the UK.
| Feature | Mounjaro | Wegovy |
|---|---|---|
| Drug class | Dual GIP/GLP-1 agonist | GLP-1 agonist |
| Active ingredient | Tirzepatide | Semaglutide |
| Avg. weight loss | 15–22.5% | 12–17% |
| Key trial | SURMOUNT-1 (2022) | STEP 1 (2021) |
| Max dose | 15 mg weekly | 2.4 mg weekly |
| Escalation period | 20–32 weeks | 16–20 weeks |
| Administration | Weekly injection (pen) | Weekly injection (pen) |
| NHS availability | Private prescription only | NHS & private |
| Approx. private cost | £150–£250/month | £150–£300/month |
| Common side effects | Nausea, diarrhoea, constipation | Nausea, vomiting, diarrhoea |
Data sourced from SURMOUNT-1 and STEP 1 clinical trials. Costs are approximate and vary by provider. Always consult a prescriber.
Am I Eligible for Weight Loss Medication?
In the UK, eligibility for GLP-1 weight loss medications like Mounjaro and Wegovy is based on your BMI and overall health profile.
- BMI of 30 or above (obese)
- Age 18 or over
- No contraindicated conditions
- Committed to lifestyle changes
- BMI of 27 or above
- Plus type 2 diabetes
- Or high blood pressure
- Or obstructive sleep apnoea
Use our BMI calculator to check whether your BMI falls within the eligible range.
How We Built These Tools
Every calculator and guide on myweightcheck is built with accuracy and transparency in mind. Our BMI calculator uses the standard WHO formula with NHS-aligned category thresholds. Our GLP-1 projections are modelled on published clinical trial data from SURMOUNT and STEP studies.
All data stays on your device. We don't require sign-ups, and we don't store your health information on any server. Your progress tracker saves data locally in your browser using localStorage, so only you can see it.
We're based in the UK and our tools are designed specifically for UK users — supporting stone & lbs by default, referencing NHS guidelines, using NICE-approved medication data, and linking to GPhC-registered pharmacies.
Frequently Asked Questions
Common questions about BMI, weight loss medications, and our free UK tools.
How much weight do I need to lose to ease sciatica pain?
Research suggests that losing even 5–10% of your body weight can reduce pressure on the sciatic nerve and ease symptoms. For example, if you weigh 100 kg, losing 5–10 kg may noticeably improve pain. However, individual results vary depending on where you carry excess weight and the underlying cause of your sciatica. Your GP can give personalised advice for your situation.
Can prescription weight loss medication help with sciatica?
Prescription weight loss medications like GLP-1 injections (Wegovy or Mounjaro) may help if you're eligible and your GP recommends them as part of a broader weight management plan. These medications are prescription-only and require clinical assessment. They're designed to be used alongside lifestyle changes like diet and exercise, not instead of them. Always discuss with your GP whether weight loss medication is appropriate for managing your sciatica.
How long does it take to feel sciatica pain relief after losing weight?
Many people notice improvement in symptoms within weeks of starting weight loss, though timescales vary. Some relief may come from reduced inflammation, while long-term structural improvements (like better spinal alignment) develop over months. Combining weight loss with targeted physiotherapy exercises and stretching often speeds up pain relief. Your GP or physiotherapist can monitor your progress.
What's my healthy weight if I have sciatica?
Use our free BMI calculator to find your healthy weight range based on your height. The NHS defines healthy weight as a BMI between 18.5 and 24.9 (or 18.5–22.9 for adults of South Asian, Chinese, Black African, or Black Caribbean heritage). Reaching the upper end of the healthy range is often enough to ease sciatica symptoms significantly in many people.
Should I exercise while losing weight with sciatica?
Yes — gentle, targeted exercise is crucial. Walking, swimming, pilates, and physiotherapy exercises specifically designed for sciatica often ease pain while supporting weight loss. Avoid high-impact activities that aggravate symptoms. Your GP or physiotherapist can recommend safe exercises that suit your pain level and help both weight management and sciatica recovery.
Ready to take control of your weight loss journey?
Start with a free BMI check, explore your GLP-1 options, or begin tracking your progress today. No sign-up. No cost. Just results.