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Muscle strains, or pulled muscles, are injuries that cause stretching and tearing of muscle fibres. They can range from minor to severe, with minor strains involving minimal structural damage and severe strains resulting in a complete rupture of the muscle or tendon. When a muscle is injured, it typically undergoes an inflammatory phase characterised by significant swelling and inflammation. This is a natural response that facilitates the healing process. However, excessive swelling can be managed with ice and elevation of the affected area.
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What You'll Learn
Muscle strain severity
Muscle strains can be categorised into three grades of severity, based on the extent of damage to the muscle fibres.
A Grade 1 strain is a mild strain, where the muscle fibres are stretched or pulled, causing minor damage, but the muscle is not torn through. This is the most common type of muscle strain. The muscle remains intact and strong, with only a few fibres stretched or torn. The injured muscle will be tender and painful, but will exhibit normal strength. Grade 1 strains can be identified by edema or fluid in the muscle on an MRI scan.
Grade 2 strains are moderate strains, where a greater number of muscle fibres are involved and damaged, resulting in more severe pain and tenderness. There is a noticeable loss of strength and motion, and the injury may present with mild swelling and bruising. In these cases, the muscle is not completely ruptured, but there is extensive damage.
Grade 3 strains are severe strains, characterised by a complete rupture of the muscle or tendon. This results in a total loss of function and a palpable defect in the muscle or tendon. However, swelling in the area may obscure this defect during diagnosis. Grade 3 strains often require surgery to repair the muscle and tendon and can take a significant amount of time to heal, typically four to six months.
The severity of a muscle strain will impact the length of the healing and rehabilitation process. Mild strains may heal quickly on their own, but more severe strains may require a structured rehabilitation program.
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Swelling and pain management
Muscle strains, or pulled muscles, are common but painful injuries. They can be caused by pulling a muscle too hard, over-fatigue, or twisting it. When a muscle is initially injured, inflammation and swelling occur, and a significant amount of scar tissue forms where the muscle was injured.
If you experience severe pain, bruising, and swelling, it is important to seek medical attention. Your doctor will ask about your medical history and may perform a physical examination, including an ultrasound or MRI to check for tears, blood clots, or internal bleeding.
For minor strains, you can often treat a pulled muscle at home. Here are some ways to manage swelling and pain:
- Apply ice to the injury as soon as possible to help reduce swelling and local bleeding. Start with 10-15 minutes each hour for the first day, then apply ice every 3-4 hours on subsequent days. Remember to wrap your ice pack in a towel to protect your skin.
- Keep the pulled muscle elevated, ideally above your heart, when sitting or lying down. This can help with swelling.
- Take non-steroidal anti-inflammatory drugs (NSAIDs) such as naproxen or ibuprofen to reduce pain and improve mobility. Avoid NSAIDs if you have kidney disease, a history of gastrointestinal bleeding, or are taking blood thinners. In such cases, acetaminophen can be a safer alternative for pain relief.
- After a few days, if the pain persists, switch to a heat compress to increase blood flow to the area.
- Your doctor may also recommend alternative treatments such as chiropractic or osteopathic manipulation, acupuncture, or myofascial release (a type of massage that focuses on releasing muscle tightness).
It is important to rest the affected area and avoid activities that may worsen the injury or cause further muscle strain. With time and proper treatment, most muscle strains will heal.
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Healing and recovery
Muscle strains are common but painful injuries that can often be treated at home. However, severe tears might need medical care or surgery. Most people recover completely from a muscle strain, even a severe one.
The healing time for a muscle strain depends on its severity. Muscle strains are graded into three categories based on severity:
- Grade I: Mild muscle strain with minor damage but no tear.
- Grade II: Moderate muscle strain with a partial tear and significant loss of strength and motion.
- Grade III: Severe muscle strain with a complete rupture of the muscle or tendon.
Grade I strains should heal within a few weeks, while Grade II strains may take several weeks to months. Grade III strains can take four to six months to heal after surgery.
To promote healing and recovery from a muscle strain, it is important to:
- Rest and avoid intense activity.
- Ease pain with ice, massage, topical creams, or over-the-counter painkillers.
- Perform gentle stretches and isometric exercises to promote healing and flexibility.
- Get enough sleep, as this is when the body repairs muscles.
- Consume a balanced diet with adequate protein and hydration to support muscle recovery and regeneration.
- Elevate the affected area to reduce swelling.
- Seek physical therapy or manual therapy to improve circulation and restore mobility.
- Give the muscle adequate time to heal before returning to activity to prevent re-injury.
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Prevention and treatment
Muscle strains can be prevented by taking some basic precautions. Try not to remain in one position for too long, and take frequent breaks to move and change position. Use a chair that provides good support for your lower back, or use a pillow for support. Keep your knees level with your hips, and maintain good posture when standing and sitting. If you spend long periods in one position, try to alternate by putting one foot and then the other on a low footstool.
Most muscle strains can be treated at home, but severe strains may require medical attention. For mild to moderate strains, rest the muscle until the pain improves. Avoid using the muscle for a few days, especially if movement causes an increase in pain. Apply ice immediately after the injury to minimise swelling. After three days, apply heat to the muscle several times a day to help bring blood circulation to the area for healing. Take nonsteroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen to reduce pain and improve mobility. Do not take NSAIDs if you have kidney disease, a history of gastrointestinal bleeding, or are taking a blood thinner. In this case, it is safer to take acetaminophen, which lessens pain but does not reduce inflammation.
Begin light stretching as soon as possible, and slowly increase your level of activity. Make sure to stretch and warm up before exercising when you return to normal activity. This will help increase blood flow to your muscles and decrease your risk of injury. For severe tears, medical care or surgery may be required.
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Muscle strain diagnosis
Muscle strains are common but painful injuries, and they can vary from mild to severe. A muscle strain is a tear in the muscle fibres, which can be partial or complete. They are caused when the force on a muscle is so great that the tissue is damaged. This often happens during explosive movements, such as pushing off during a sprint, or when the muscle is over-fatigued.
Muscle strains are diagnosed almost exclusively based on patient history and a physical examination. A healthcare provider will ask when the pain started and what activities the patient was engaged in at the time. They will then examine the spot, checking for visible bruising and swelling, tenderness, and testing the muscle for strength and range of motion.
In most cases, a physical exam is enough to diagnose a pulled muscle. However, in some instances, an MRI may be required to rule out other conditions or to determine the severity of the tear. An X-ray may also be used to rule out a fracture or dislocation as the cause of pain, although pure muscle injuries cannot be seen on regular X-rays.
Muscle strains are graded based on their severity. A grade 1 strain involves minor damage to the muscle fibres, with minimal structural damage. Grade 2 strains involve more extensive damage, with more muscle fibres involved, and a significant loss of strength and motion. Grade 3 strains involve a complete rupture of the muscle or tendon and may require surgery.
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Frequently asked questions
A muscle strain, also known as a pulled muscle, is an injury that causes stretching and sometimes tearing of the muscle fibres.
Symptoms of a muscle strain include pain, swelling, bruising, weakness, and limited range of motion.
Treatment for a muscle strain includes rest, ice, compression, and elevation (RICE). Nonsteroidal anti-inflammatory drugs (NSAIDs) can also be taken to reduce pain and improve mobility.
Yes, muscle strains can cause swelling due to inflammation in the injured area.
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