Back pain when breathing: what is happening?

Feeling a stab, twinge, or tight pain in the back when breathing deeply is an experience that immediately generates anxiety — after all, any pain linked to breathing raises questions about the heart or lungs. In the great majority of cases, however, this pain has musculoskeletal origin: it is the muscles of the posterior thoracic wall — rhomboids, erector spinae, serratus posterior — or the diaphragm itself that is generating the pain when stretched during deep inspiration.

The differential diagnosis is critical: pleuritic pain (pleural inflammation) also worsens with breathing, but is accompanied by fever, cough, and abnormal auscultation. Cardiac pain rarely worsens in isolation with breathing and is accompanied by radiation to the left arm, jaw, or cold sweating. When these warning signs are absent and the pain is reproducible on muscle palpation, musculoskeletal origin is the most likely hypothesis.

The muscles involved in respiratory thoracic pain

  1. Rhomboid major and minor

    Inserted on the medial border of the scapula and on the thoracic spinous processes (T2-T5), the rhomboids are scapular retractors that become chronically overloaded in people with a protracted posture (shoulders forward, as occurs in office work). Their trigger points generate deep pain between the shoulder blades, exactly in the mid-thoracic spine region, that worsens with deep breathing — because thoracic expansion forces the rhomboids to lengthen.

  2. Thoracic erector spinae

    The thoracic iliocostalis, longissimus, and spinalis form the extensor musculature of the spine. Their trigger points in the mid- and lower-thoracic region refer pain to the ribs and lateral chest, intensifying with deep breathing that requires rib cage mobility. They are frequently responsible for pain the patient describes as "in the ribs, on the inside".

  3. Diaphragm

    The diaphragm is the main respiratory muscle — its chronic tension (from stress, paradoxical breathing, flexed posture) generates pain in the lower chest and upper lumbar back when breathing deeply. Medical acupuncture can access the diaphragm with subcostal needling, relaxing diaphragmatic spasm and restoring respiratory amplitude.

  4. Serratus posterior inferior

    A muscle with low costal insertion, frequently neglected, that generates diffuse pain in the upper lumbar and lower thoracic region with breathing. It is activated as an inspiratory accessory muscle in conditions of increased respiratory effort — chronic bronchitis, asthma, emphysema — where it develops overload and trigger points.

Prevalence and clinical impact

70%
OF THORACIC PAIN
seen in emergency departments has musculoskeletal origin — the most common cause, far ahead of cardiac or pulmonary causes
85%
OF CASES
of musculoskeletal respiratory costal pain have identifiable trigger points on physical examination as the main or contributing cause
6–8
SESSIONS
of medical acupuncture with dry needling of the thoracic muscles are sufficient for resolution or marked improvement in most cases
3×
MORE FREQUENT
in office workers with kyphotic posture — where rhomboids and erectors sustain chronic postural load

Clinical pattern of musculoskeletal thoracic pain

Critérios clínicos
08 itens

Signs that point to musculoskeletal origin

  1. 01

    Pain between the shoulder blades or in the thoracic spine that worsens with deep breathing

  2. 02

    Pain reproducible by pressure on the paravertebral muscles or medial border of the scapula

  3. 03

    Worsening with prolonged seated posture or computer use

  4. 04

    Relief with local heat, massage, or change of posture

  5. 05

    Pain that is "sharp" on inspiration but not constant or tightening

  6. 06

    Absence of fever, cough, dyspnea, or radiation to the arm

  7. 07

    Sensation of "locking" between the shoulder blades, as if needing to brace the back

  8. 08

    Worsening with cough or sneeze — but without anterior chest pain component

Myths about back pain on breathing

Myth vs. Fact

MYTH

Pain on breathing in the back is always a sign of a lung problem

FACT

Pulmonary pleural pain (pleuritis, pneumothorax) is accompanied by dyspnea, fever, or abnormal auscultation. Musculoskeletal pain is reproducible on muscle palpation, without systemic symptoms — and is by far the most prevalent cause of thoracic pain in general at health units, according to a survey published in <em>Annals of Internal Medicine</em>.

MYTH

The diaphragm does not cause back pain

FACT

The diaphragm has posterior insertion on the upper lumbar spine (diaphragmatic crura, L1-L3) and on the lower ribs. Its chronic tension generates upper lumbar and lower posterior thoracic pain, frequently confused with renal or common low back pain. Subcostal medical acupuncture and needling at the diaphragmatic crura resolve this component.

Clinical pearl: the differentiation test

Medical acupuncture treatment protocol

Assessment and exclusion of serious causes
1st visit

Targeted history-taking to exclude cardiac, pulmonary, and pleural causes: fever, dyspnea, hemoptysis, radiation to the arm. Pulmonary auscultation. With structural causes excluded, physical examination of the posterior thoracic muscles: palpation of rhomboids, erectors, serratus posterior, and costal margin (diaphragm).

Posterior thoracic dry needling
Sessions 1–3

Needling of trigger points in the rhomboids (T2-T5 paramedian), middle thoracic erectors, and serratus posterior inferior. Controlled depth — the thoracic region requires precision to avoid pneumothorax. 2-4 Hz electroacupuncture on thoracic points for segmental analgesia. Some patients report relief in the first sessions.

Diaphragm and rib approach
Sessions 4–6

Subcostal needling at the diaphragmatic crura (in case of an upper lumbar pain component). Guided respiratory mobilization: diaphragmatic breathing exercises to restore normal ventilatory mechanics. Approach to perpetuating postural causes — thoracic kyphosis, work posture.

Maintenance and prevention
Sessions 7–10

Monthly maintenance sessions in cases with sustained postural factors. Ergonomic guidance: chair height, monitor, work breaks. Strengthening exercises for the rhomboids and scapular retractors to prevent recurrence.

Frequently asked questions

FREQUENTLY ASKED QUESTIONS · 03

Frequently Asked Questions

If there are warning signs (fever, dyspnea, hemoptysis, severe pain at rest), yes — chest X-ray is necessary to exclude pulmonary or pleural pathology. With normal physical examination, absence of systemic symptoms, and pain reproducible on muscle palpation, clinical evaluation by the medical acupuncturist is sufficient to indicate treatment.

Yes, when performed by a trained medical acupuncturist. The thoracic region requires depth precision to avoid iatrogenic pneumothorax — a rare complication, but preventable with correct technique (oblique and superficial needling at paravertebral points, respecting the ribs as a depth barrier). In the hands of a physician with specific training, it is a safe and effective procedure.

Most patients with respiratory costal musculoskeletal pain without chronification respond in 4–6 sessions. Cases with chronic pain (>3 months), markedly altered posture, or very overloaded muscles may require 8–10 sessions, with monthly maintenance.