Blocked Ducts and Mastitis
Reviewed by Cheryl Long, AHPC-registered physiotherapist, Goji Physio
Blocked milk ducts and mastitis are painful and common challenges during breastfeeding. Physiotherapy — specifically therapeutic ultrasound and hands-on breast massage — is an evidence-supported adjunct for resolving blocked ducts and supporting recovery from mastitis. This is not a substitute for medical care or lactation support, but it is a meaningful complement to it.
What causes blocked ducts and mastitis?
A blocked duct (also called a plugged duct or milk bleb) occurs when milk flow in one or more ducts is obstructed. Causes include poor latch, infrequent or incomplete drainage, pressure from a tight bra or seatbelt, or changes in feeding frequency. Symptoms typically include a tender, hard lump in the breast and localised redness or warmth.
Mastitis is an inflammatory condition of the breast tissue — it may or may not be associated with infection. Non-infective mastitis can arise from persistent blocked ducts or milk stasis. Infective mastitis involves bacterial infection and usually presents with fever, flu-like symptoms, and significant breast pain. Both forms require medical assessment. If you have a fever, rapidly worsening symptoms, or pus discharge, see your GP promptly — physiotherapy is not the first step.
How can physiotherapy help with blocked ducts?
Therapeutic ultrasound uses sound wave energy to generate gentle mechanical vibration in the breast tissue. There is evidence supporting that this can help to break up blocked ducts, improve local circulation, and reduce inflammation — when applied correctly by a trained physiotherapist. This is different from the "ultrasound" imaging used in scans; therapeutic ultrasound is a treatment modality.
Physiotherapy for blocked ducts may also include:
Manual breast massage techniques or lymphatic massage to improve drainage, applied with your consent and comfort as the guide
Education on positioning and latch adjustment to address mechanical causes of the blockage
Advice on feeding frequency and drainage strategies
Physiotherapy works best alongside — not instead of — input from a lactation consultant (IBCLC) or your GP, who can assess whether antibiotic treatment is needed.
What does a session at Goji involve?
Our physiotherapist will take a history of your symptoms — duration, feeding pattern, any previous episodes, and whether you have had any medical assessment. A clinical assessment of the affected area will be done. Therapeutic ultrasound treatment is typically around 5–10 minutes per affected area, applied through appropriate coupling gel, and is not painful.
You are welcome to continue feeding or pumping before and after the session. Most women find a session comfortable and manageable with a newborn in tow — there is space at Goji for you to feed during or between treatment elements if needed.
One to three sessions are typically needed for a straightforward blocked duct; mastitis recovery may require more. Our physiotherapist will give you a realistic expectation at your first appointment.
When should I see a doctor rather than a physio?
Physiotherapy is appropriate for blocked ducts and mild-to-moderate inflammatory mastitis that is being managed medically. Seek medical attention promptly if you experience:
Fever above 38.5°C
Rapidly worsening redness, swelling, or pain
Pus or blood in breast milk
Symptoms that are not improving within 24–48 hours of starting antibiotics
A fluctuant (fluid-filled) swelling that may indicate a breast abscess
A breast abscess requires surgical drainage and is a medical emergency — not a physiotherapy presentation.
Frequently asked questions
Is therapeutic ultrasound safe while breastfeeding?
Yes. When applied by a trained physiotherapist using appropriate parameters, therapeutic ultrasound is safe during breastfeeding. It is applied to the breast tissue, not to the nipple. Our physiotherapist will explain the treatment, confirm consent, and adjust parameters to your presentation.
Will I need to stop breastfeeding?
Physiotherapy for blocked ducts aims to support continued breastfeeding, not interrupt it. Continued feeding or pumping from the affected breast — if comfortable — is generally recommended during treatment to maintain drainage.
I've had blocked ducts three times in the past month. Is there something structurally wrong?
Recurrent blockages often point to a persistent mechanical issue — latch, positioning, bra fit, or feeding pattern. A physiotherapy assessment combined with an IBCLC review can help identify and address the underlying cause rather than just managing each episode in isolation.
How quickly does therapeutic ultrasound work for a blocked duct?
Many women notice improvement within 24 hours of a session. In some cases, resolution occurs during or immediately after treatment. For more established blockages or inflammatory mastitis, several sessions may be needed.
Do I need a referral to see you for this?
No. You can contact Goji directly. However, if you have infective mastitis or any concerning symptoms, please ensure your GP is involved in your care — physiotherapy is an adjunct, not a replacement for medical management.
Can physiotherapy help with recurrent mastitis?
Physiotherapy can address some of the mechanical contributors to recurrent mastitis (poor drainage, latch mechanics, tissue mobility). For recurrent infective mastitis, a GP or specialist review is important to rule out structural causes or antibiotic resistance.
Tell us about your symptoms and feeding situation — we'll let you know if physiotherapy is appropriate and how quickly we can see you.
Reviewed by Cheryl Long, BSc (Hons) Physiotherapy, AHPC-registered
Clinical Director, Goji Physio — Women's and Family Physiotherapy, Lentor, Singapore
Related conditions:
Prenatal Care & Birth Preparation | Pelvic Organ Prolapse
