Finding the right pillow can feel like searching for a needle in a haystack, but according to leading physiotherapist Dr Chris McCarthy, the secret lies in understanding your sleep position. As someone who travels with his own pillow and spends hotel stays adjusting different options, Dr McCarthy knows firsthand that the wrong pillow can cause neck pain and disrupted rest. His insights, shared during an appearance on the BBC’s Sliced Bread podcast, reveal that pillow selection is far more scientific than most realise.
Understanding Your Sleep Position
Dr McCarthy, an associate professor at the Manchester School of Physiotherapy, categorises sleepers into three main types: side, back and front sleepers. While he acknowledges that front sleeping is common, he strongly advises against it due to the strain it places on neck muscles and ligaments. “Inevitably a muscle or ligament gets stretched and a bit irritated,” he explains, noting that avoiding this position is one of the few areas of consensus among physiotherapers dealing with spinal pain.
Back sleepers face a unique challenge related to spinal flexion. As we age, natural curvature increases in the upper spine, meaning those with a more pronounced curve will need a slightly thicker pillow than someone with a flatter back. This consideration becomes particularly important when selecting from the myriad of options available on the market.
Matching Pillow Height to Your Mattress
The relationship between pillow height and mattress firmness is crucial yet often overlooked. Dr McCarthy emphasises that how much you sink into your mattress dramatically affects the optimal pillow height. Side sleepers, who tend to sink more than back sleepers, need to consider both shoulder width and mattress softness when choosing their ideal pillow thickness.
“Broad shoulders need a thick pillow if you’re on a very firm mattress,” he explains, “but if you’re on a softer mattress, then you need a thinner pillow because your shoulder sinks into the mattress [more].” This adjustment can make the the difference between waking with a stiff neck or enjoying refreshing mornings.
Shape, Material and Personalisation
Contoured and orthopaedic pillows have become increasingly popular, but Dr McCarthy cautions that evidence for their effectiveness remains limited. He suggests a simple test: using the towel trick to create a higher front section under your existing pillow to see if it provides better neck support. For side sleepers, the goal is maintaining a straight spine throughout the night.
Back sleepers may find pillows with a central dip and raised edges beneficial, though some patients report feeling “a bit claustrophobic” with this design. Those with larger heads require thicker, firmer pillows to provide adequate support throughout the night.
Material choice also plays a significant role. Feather and down pillows excel at temperature regulation on warmer nights, wicking away heat effectively. However, they can lose their shape during the night, especially for restless sleepers, potentially creating awkward neck positions by morning. Hollow fibre and microfibre fillings maintain their form better but don’t offer the same cooling properties. Some manufacturers now create pillows with firmer base sections to combat shape-shifting throughout the night.
Dr McCarthy himself uses a foam pillow with tubular ventilation channels, purchased five years ago for approximately £50. As a side sleeper, he employs his towel adjustment method to achieve perfect height. His advice is clear: there’s no universal solution. “There just isn’t a one-off design that is perfect for everybody or every position, I’m afraid,” he says. “You really have to personalise it.”
Many manufacturers offer trial periods for their pillows, allowing you to test different options and make adjustments before committing to a purchase. This personalised approach ensures you find the support that works for your unique needs and sleeping habits.