Shoulder Pain at Night? Why It Wakes You at 3am and What It Could Be

3:40am. Like the man in the photo, you're awake again. You rolled onto your shoulder in your sleep and a deep, sharp ache woke you up. You shift, try the other side, and lie there waiting for it to settle. It's always worse after a long day at work. In the daytime it pinches when you lift your arm to reach a shelf, put on a shirt or brush your hair, yet some movements feel fine.

Night shoulder pain is one of the most common reasons people come to our Westlands clinic. Most often, it's one of two things.

1. Shoulder impingement: the pinch

Your shoulder is surrounded by four small muscles and their tendons, called the rotator cuff. They hold the ball of your shoulder in its socket. When these muscles are tired or weak, or your posture is rounded from desk work, the space at the top of the shoulder gets tight. Lifting your arm then pinches the tendons, and you feel a sharp catch.

Signs of impingement:

• Sharp, pinching pain when lifting your arm forward or out to the side, especially around shoulder height
• Pain eases once your arm goes past that point, or when you rotate or lower it
• Deep ache at night, especially lying on that side
• Worse after a long day of desk work, lifting or reaching

2. Rotator cuff tear: the weakness

Sometimes one of those four tendons gets a tear. This can happen after a fall or a heavy lift, or slowly over time, especially after 40.

Signs of a possible tear:

• Weakness lifting your arm, not just pain
• Trouble holding your arm up or lifting a light object overhead
• Night pain that keeps you from sleeping on that side
• Clicking or catching in the shoulder

The good news: many tears, especially small or slowly developing ones, do well with the right physiotherapy and never need surgery.

Why it's worse at night

Lying on the shoulder squeezes the sore tendons. When you lie on the other side, the painful arm can drop forward and pull on them. And after a busy day, the tendons are already tired and sensitive.

Tips for tonight

• Avoid lying on the painful shoulder
• On your back, put a pillow under your painful arm
• On the other side, hug a pillow so the sore arm rests on it
• Avoid reaching overhead before bed

How Katasi Physiotherapy treats night shoulder pain

We test your shoulder's movement and strength to tell impingement from a tear, and refer you for a scan only if it's needed. Treatment includes hands-on therapy and dry needling to ease the pain, exercises to strengthen the rotator cuff and shoulder blade muscles, and posture changes for work and sleep. Most people sleep better within a few weeks.

Read more: Shoulder Pain When Lifting Your Arm?, Frozen Shoulder and Tight, Nagging Shoulder Pain From Working at Home?

See a doctor straight away if

Your shoulder pain comes with chest pain, shortness of breath or sweating, or you suddenly can't lift your arm after a fall.

Book in Westlands

Sleep through the night without your shoulder waking you. Visit Katasi Physiotherapy at Kerai Office, Mogotio Road off Muthithi Road, Westlands, Nairobi. Call or WhatsApp 0705 717 353 to book. Open Monday to Friday 7am–6pm and Saturday 8am–4pm.