You can make a functional arm sling at home using a square piece of fabric about 40 inches on each side, folded into a triangle. A pillowcase, bedsheet, or even a t-shirt will work. The whole process takes under five minutes, and the result supports your arm nearly as well as a store-bought sling.
What You Need
The ideal material is a sturdy piece of cloth roughly 40 inches square. A standard pillowcase works well because it’s already close to the right size and is soft against your skin. A bedsheet cut to size, a large scarf, or a tablecloth are all fine alternatives. The fabric should be strong enough to hold the weight of your arm without stretching or tearing. Avoid anything too slippery, like satin, since it won’t hold a knot securely.
You’ll also need scissors if the fabric isn’t already the right size, and optionally a safety pin to secure the sling near your elbow once it’s in place.
Triangular Sling: Step by Step
Start by cutting or folding your square of fabric diagonally to create a triangle. This is the classic triangular bandage shape used in first aid kits worldwide.
- Position the triangle. Hold the fabric so the longest edge runs vertically. Slip one pointed end over the shoulder on your uninjured side so it drapes behind your neck. The rest of the fabric should hang down in front of your body.
- Cradle your arm. Bend your injured arm at the elbow so your forearm is roughly horizontal. Lay it across the middle of the hanging triangle. Your hand should sit slightly higher than your elbow to help reduce swelling.
- Bring the bottom point up. Take the lower corner of the triangle and bring it up and over your injured arm, then carry it behind your neck on the injured side.
- Tie the ends. Tie the two ends together behind your neck or just to the side of it. Make sure the knot does not press directly onto the bones at the back of your neck or dig into the skin. Shifting the knot slightly to one side is more comfortable.
- Secure the elbow. You’ll have a flap of fabric near your elbow. Fold it neatly and pin it with a safety pin, or simply tuck it in to keep your elbow snug inside the sling.
Your forearm should rest comfortably in the pouch of fabric with your fingers visible at the open end. If you can’t see your fingers, you won’t be able to check for circulation problems later.
Quick Alternatives When You Don’t Have Scissors
If you can’t cut fabric or don’t have a large enough piece, a few everyday items work surprisingly well as improvised slings.
T-shirt or sweatshirt method: Take a long-sleeved shirt, hoodie, or coat. Tie the two sleeves together behind your neck, creating a loop in front of your body. Rest your injured arm inside the loop. This is one of the fastest options and requires no cutting at all.
Collar and cuff sling: If you suspect a broken collarbone or elbow injury where a full triangular sling feels too bulky or painful, use a narrower approach. Take a strip of bedsheet, a belt, a necktie, or even a leg cut from a pair of pants. Wrap it around your wrist, then bring both ends up and tie them behind your neck. This supports the weight of your arm without pressing fabric against the injury site.
Getting the Position Right
The most common mistake with homemade slings is letting the hand droop below the elbow. Your hand should sit slightly above elbow level. This positioning helps fluid drain away from the injury rather than pooling in your fingers and hand, which causes uncomfortable swelling.
Your elbow should be bent at roughly a 90-degree angle. If you need more elevation because of significant swelling, you can create a high-arm sling by tying the fabric so your hand rests near your opposite shoulder. In a high-arm sling, the hand sits well above the elbow.
Padding matters too, especially at the neck. If the fabric feels like it’s cutting into the back of your neck, fold a small towel or washcloth underneath the strap for cushioning. This makes a real difference if you’ll be wearing the sling for more than a few minutes.
Checking Circulation After You Apply It
A sling that’s too tight can cut off blood flow to your hand and fingers. Check for these warning signs every couple of hours:
- Color change. Your fingers should be their normal pink color. If they turn pale, blue, or dusky, the sling is restricting blood flow.
- Temperature. Feel your fingertips on the injured side. If they’re noticeably colder than the fingers on your other hand, circulation is compromised.
- Tingling or numbness. A pins-and-needles sensation or loss of feeling in your fingers means nerves or blood vessels are being compressed.
- Capillary refill. Press firmly on a fingernail until it turns white, then release. The pink color should return within two seconds. If it takes longer, blood isn’t flowing well enough.
If you notice any of these signs, loosen or retie the sling immediately. Pain that seems out of proportion to the injury, especially pain that gets worse when you gently stretch your fingers, can signal a more serious problem called compartment syndrome, which needs emergency care.
How Long to Wear a Homemade Sling
A homemade sling is a temporary measure. It’s meant to stabilize your arm until you can get proper medical attention or a fitted sling. Even with a proper sling, keeping your arm immobilized for too long creates its own problems. Extended immobilization can lead to joint stiffness, muscle weakness, and in some cases a condition called frozen shoulder, where the shoulder joint becomes so stiff it’s painful to move in any direction.
If you’re using a homemade sling because you’re waiting for a doctor’s appointment, keep wearing it for comfort and support, but gently wiggle your fingers periodically to maintain circulation. Once a healthcare provider evaluates the injury, they’ll let you know whether you need continued immobilization, a different type of support, or can start moving the arm again with specific exercises.