Direct answer
Alternate-nostril breathing is a pranayama method that alternates airflow through the nostrils using a hand position. Beginners should breathe gently without retention, pressure or a rigid count. Stop for dizziness, air hunger, tingling or distress. Research is promising for selected outcomes but heterogeneous; the practice should not replace blood-pressure or other medical treatment.
Names and variations
Nadi Shodhana and Anulom Vilom are often used for alternate-nostril practices, but teachers and traditions distinguish techniques differently. Some versions include breath retention, prescribed ratios or force; others simply alternate comfortable inhalation and exhalation.
Ask which method is being taught rather than assuming every video is equivalent. Traditional explanations about nadis belong to yogic frameworks and should not be translated automatically into claims of physically cleaning nerves or arteries.
A gentle beginner version
Sit supported with the head and chest comfortable. Let the non-working hand rest. Use a finger to close the right nostril softly and breathe in through the left. Switch sides without pressing the nose hard, breathe out through the right, then inhale right, switch and exhale left. That completes one round.
Keep the breath quiet and easy. Begin with three to five rounds, then release the hand and breathe normally. Skip retention and long ratios. If one nostril is blocked, do not force airflow; practise ordinary breath awareness instead.
The broader [pranayama safety guide](/journal/yoga/pranayama-breathing-safety) explains why rapid breathing and long holds require different caution.
What evidence says
A 2024 systematic review and meta-analysis examined alternate-nostril breathing and blood pressure. It reported reductions across studies but also very high heterogeneity and difficulty with blinding. That means results varied substantially and should be interpreted cautiously.
Breathing-exercise reviews include multiple methods, durations and populations. Evidence about group averages cannot establish a personal medication adjustment or an immediate treatment for high blood pressure.
Continue prescribed care and monitor blood pressure according to clinician guidance. Do not delay urgent assessment for severe symptoms because a breathing practice feels calming.
Who should seek individual advice
Discuss breath practices with an appropriate health professional when pregnant, managing significant cardiovascular or respiratory disease, recovering from surgery, or affected by panic, dizziness or fainting. Nasal injury, severe congestion or bleeding may make nostril manipulation unsuitable.
Stop for chest pain, faintness, severe breathlessness, neurological symptoms or worsening distress. Practise only where it is safe to pause—not while driving, swimming or operating equipment.
Avoid claims about left and right sides
Online explanations may assign one nostril fixed effects on brain hemispheres, hormones, heat or emotion. Immediate physiological studies are not enough to validate universal personality or treatment claims. Present traditional solar and lunar associations as interpretations within traditions, not established diagnoses.
Keep the hand comfortable
The fingers can use any position that avoids wrist and shoulder strain. A formal [yoga mudra](/journal/yoga/yoga-mudras-guide) is optional. Support the elbow or switch hands if fatigue distracts from easy breathing.
Conclusion
Alternate-nostril breathing is a traditional pranayama with many versions. Start with gentle alternating airflow and no retention, keep expectations modest and stop when breathing no longer feels easy. Research interest does not turn the technique into a substitute for clinical care.