Where sternocleidomastoid pain is felt, and what causes it

Introduction

Sternocleidomastoid muscle pain is a common complaint affecting many people at some point. The sternocleidomastoid (SCM) is a long neck muscle that helps you turn and tilt your head. When it becomes tight, injured, or strained, it can cause noticeable discomfort, stiffness, and even headaches. Understanding where SCM pain is felt and what causes it can help you take steps to relieve symptoms and prevent future episodes.

Anatomy and Location

The sternocleidomastoid is one of the most prominent neck muscles. It has two heads:

• Sternal head: Originates at the top of the breastbone (sternum)
• Clavicular head: Originates at the collarbone (clavicle)

Both heads merge and insert behind the ear on the skull (mastoid process). Key points about location:

• Runs diagonally along the side of the neck
• Easily felt by placing fingers just below the ear and along the front of the neck
• Works to rotate the head to the opposite side and flex the neck forward

Where Sternocleidomastoid Muscle Pain Is Felt

When you experience sternocleidomastoid muscle pain, you may notice:

• A sharp or aching pain on one or both sides of the neck
• Tenderness along the front and side of the neck, just below the ear
• Referred pain to the head, temples, forehead, or behind the eyes
• Stiffness when turning the head or tilting it side to side
• Tight bands or knots you can feel under the skin

In some cases, trigger points in the SCM can cause:

• Headaches on the side of the head or around the eye
• A sense of fullness in the ear or mild dizziness
• Jaw pain or discomfort when chewing

Common Causes of Sternocleidomastoid Muscle Pain

Several factors can contribute to sternocleidomastoid muscle pain. Identifying the root cause helps guide treatment and prevention.

1. Poor Posture

   • Forward head posture (common with desk work or smartphone use)
   • Hunching shoulders, rounding back
   • Sleeping with the neck in an awkward position

2. Acute Injury or Strain

   • Whiplash from car accidents or sports impacts
   • Sudden rotation or overextension of the neck
   • Lifting heavy objects without proper support

3. Muscle Overuse

   • Repetitive head-turning activities (e.g., driving, certain occupations)
   • Holding the phone between shoulder and ear for long periods

4. Trigger Points and Myofascial Pain

   • Localized “knots” that refer pain to the head, face, or chest
   • Can develop from chronic tension or repeated microtrauma

5. Stress and Emotional Tension

   • Holding stress in the neck and shoulders leads to chronic tightness
   • Clenching jaw and tensing upper body

6. Underlying Medical Conditions

   • Cervical spine arthritis or disk degeneration
   • Infections (e.g., throat infections spreading to neck muscles)
   • Thyroid enlargement pressing on nearby tissues

Diagnosis

A healthcare provider will typically diagnose sternocleidomastoid muscle pain through:

• Medical history: Onset, duration, and triggers of pain
• Physical exam: Palpating the SCM to find tender spots or trigger points
• Range of motion tests: Observing neck movement limitations
• Neurologic exam: Checking for nerve involvement if symptoms include tingling or weakness

In rare cases, imaging (X-ray, MRI) may be ordered to rule out structural issues in the cervical spine.

Treatment Options

Fortunately, most cases of sternocleidomastoid muscle pain improve with conservative measures:

Self-Care and Home Remedies

• Rest and activity modification: Avoid movements or positions that worsen pain
• Heat and cold therapy: Alternate warm packs to relax muscles with cold packs to reduce inflammation
• Gentle stretching: Slowly tilt and rotate the head to maintain flexibility
• Over-the-counter pain relievers: Ibuprofen or acetaminophen as directed

Manual Therapies

• Massage therapy: Focus on trigger points to release tight bands
• Physical therapy: Guided exercises to strengthen neck muscles and improve posture
• Chiropractic care: Gentle adjustments to restore proper alignment

Medical Interventions

• Prescription muscle relaxants: For severe spasms
• Trigger point injections: Local anesthetic or corticosteroid into tight knots
• Ultrasound or electrical stimulation: To promote healing

When to Consider Professional Help

If self-care does not improve symptoms in a week or two, or if you experience:

• Severe, unrelenting pain
• Numbness, tingling, or weakness in arms
• High fever, significant swelling, or difficulty swallowing

…you should speak to a doctor without delay.

Preventing Recurrence

Once sternocleidomastoid muscle pain has improved, taking steps to prevent it from returning is key:

• Maintain good posture
  • Keep your ears aligned over your shoulders
  • Use ergonomic chairs and screens at eye level
• Take frequent breaks
  • Stand, stretch, and move every 30–60 minutes
• Practice neck-strengthening exercises
  • Chin tucks, gentle resistance stretches
• Manage stress
  • Mindful breathing, yoga, or meditation to reduce muscle tension
• Choose a supportive pillow
  • Avoid overly high or stiff pillows

When to Seek Further Evaluation

Persistent or worsening symptoms warrant professional evaluation. You may also try a free, online symptom check, using the doctor approved Ubie Symptom Checker to help clarify your next steps.

If you’re ever concerned that your symptoms could be serious or life-threatening, please speak to a doctor immediately.

Conclusion

Sternocleidomastoid muscle pain can range from mild stiffness to intense discomfort with referred headaches. By understanding where the pain is felt, recognizing common causes, and applying targeted self-care, most people find relief within days to weeks. Should symptoms persist or worsen, don’t hesitate to seek professional evaluation and remember to speak to a doctor about anything that could be serious.