A strain is when a muscle is stretched too much and tears. It is also called a pulled muscle. A strain is a painful injury. It can be caused by an accident, overusing a muscle, or using a muscle in the wrong way.
A strain may be caused by:
Too much physical activity or effort
Improperly warming up before a physical activity
Symptoms of a strain can include:
Pain and difficulty moving the injured muscle
Discolored and bruised skin
Take the following first aid steps to treat a strain:
Apply ice right away to reduce swelling. Wrap the ice in cloth. Do not place ice directly on the skin. Apply ice for 10 to 15 minutes every 1 hour for the first day and every 3 to 4 hours after that.
Use ice for the first 3 days. After 3 days, either heat or ice may be helpful if you still have pain.
Rest the pulled muscle for at least a day. If possible, keep the pulled muscle raised above your heart.
Try not to use a strained muscle while it is still painful. When the pain starts to go away, you can slowly increase activity by gently stretching the injured muscle.
When to Contact a Medical Professional
Call your local emergency number, such as 911, if:
You are unable to move the muscle.
The injury is bleeding.
Call your health care provider if the pain does not go away after several weeks.
The following tips may help you reduce your risk of a strain:
Warm-up properly before exercise and sports.
Keep your muscles strong and flexible.
Biundo JJ. Bursitis, tendinitis, and other periarticular disorders and sports medicine. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 25th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 263.
Nakamura N, Rodeo SA, Alini M, Maher S, Madry H, Erggelet C. Physiology and pathophysiology of musculoskeletal tissues. In: Miller MD, Thompson SR, eds. DeLee & Drez's Orthopaedic Sports Medicine. 4th ed. Philadelphia, PA: Elsevier Saunders; 2015:chap 1.
Linda J. Vorvick, MD, Clinical Associate Professor, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.