Sleeping on your side: the right position to relieve your back and hips
Do you sleep on your side and often wake up with a knotted lower back or a sore hip? You're not alone. Side sleeping is by far the most common position, and most specialists consider it one of the best for the back. What matters is that your body stays properly aligned through the night. Let's look at why this position is so well regarded, and how to get the most from it without waking your joints.
Why sleeping on your side is good for your back
When you lie on your side, your spine can settle into a fairly natural line, provided your mattress and pillow suit you. That's the strength of this position: it respects the curve of your back instead of forcing it.
Sleeping on your stomach does the opposite. It flattens the curve of the lower back and forces you to turn your neck for hours. The result is tension when you wake. Side sleeping avoids that problem and brings other benefits. According to several specialist sources, the side position also reduces the risk of snoring and limits some acid reflux, especially on the left side.
Think of your spine as a flexible rod. During the day it stays straight because your muscles hold it there. At night, your muscles let go. So it falls to your bedding and your position to take over and keep it aligned.
The real problem: pelvic rotation
Here's what happens at night, and it rarely gets noticed. When you sleep on your side with nothing between your legs, your top knee slides forward and comes to rest on the mattress. As it drops, it pulls your hip with it, then your pelvis, which rotates.
Picture two stacked plates. If the top one slides sideways, the whole balance is broken. That's exactly what happens to your pelvis. That small twist, held for several hours a night, pulls on your lower back and puts your hips under pressure. It's often the source of those mornings where the lower back pulls and one hip is sore.

Left side or right side: is one better?
The question comes up often. Both sides are good for your back and your breathing. The left side is often highlighted, in particular because it supports digestion and can limit acid reflux. It's also generally recommended during pregnancy to support blood circulation.
That said, the best side is the one where you feel good. If one hip hurts, many specialists suggest sleeping on the side opposite the pain, so you're not resting on it all night. Listen to your body: it usually points you in the right direction.
The right settings for a genuinely comfortable position
A few simple adjustments change a lot:
- Keep your legs slightly bent, without pulling your knees too high toward your chest. Curling up too tightly bends your spine too far.
- Choose a pillow that fills the gap between your shoulder and your head, so your neck stays in line with your back. Neither too flat nor too thick.
- Avoid a mattress that's too soft and lets your hips sink in, and equally one that's too hard and creates pressure points on the shoulder and hip.
- Slide support between your knees to stop the pelvis from rotating. This is the move that often makes the whole difference.
The pillow between the knees: the small move that aligns everything

This is the detail that transforms your nights. By placing a pillow between your knees, you keep your legs parallel and your hips at the same height. The pelvis stops rotating, your spine stays aligned, and pressure on the lower back and the hips comes down.
That's exactly what the Pillova alignment pillow was designed for. Its density controlled memory foam doesn't flatten out over the course of the night, unlike a plain pillow that gets squashed and ends up supporting nothing at all. Its adjustable strap holds it in place, even if you move a lot. You slide it between your knees, and it stays where it should be until morning. The cover comes off and goes in the machine, which is genuinely handy day to day.
It's a wellness accessory made to render the side position more comfortable. It doesn't replace medical advice, but it helps your body hold a healthier posture while you sleep. Pillova offers it with a 30 night trial, a 2 year warranty and free shipping, so you have time to see whether your nights improve.
And of course, if your back or hip pain persists despite these adjustments, talk to a healthcare professional. A good accessory improves comfort, but pain that lasts deserves a proper opinion.