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Dr. Philip Mostert

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Dr. Philip Mostert

Specialising in shoulder, hip, and knee surgeries, Dr. Mostert provides expert, patient-centered care at Johannesburg Surgical Hospital in Northcliff.

24/02/2026

Not all shoulder pain starts in the shoulder.

The neck and shoulder are closely connected, and irritation in the cervical spine can refer pain into the shoulder and even down the arm. Sometimes what feels like a shoulder injury is actually coming from the neck.

A few clues can help distinguish the source:

Pain triggered mainly by arm movement often suggests a shoulder joint problem.

Pain that worsens with neck movement, or travels down the arm with tingling or numbness, may point to the cervical spine.

Localised weakness can suggest rotator cuff involvement, while nerve-related symptoms tend to feel more widespread.

Correct diagnosis matters. Treating the wrong source can delay recovery and prolong discomfort.

If shoulder or arm pain is persistent or unclear, a proper assessment can help determine where it’s truly coming from and guide the most appropriate treatment.

📞 Dr Philip Mostert
📍 Johannesburg Surgical Hospital
☎️ (011) 794 5758

DrMostert

18/02/2026

A dislocated shoulder is a common injury in contact sports, rugby, cricket, tennis, swimming, and gym training. It happens when the upper arm bone slips out of the shoulder socket, often after a fall, tackle, or sudden impact.

Symptoms may include severe pain, visible deformity, swelling, and difficulty moving the arm. Even after the shoulder is put back into place, instability can remain — especially in younger or active individuals.

Repeated dislocations or ongoing instability may require further assessment to prevent long-term damage and reduce the risk of future injury.

Early evaluation is important, particularly for athletes wanting a safe return to sport.

📞 Dr Philip Mostert
📍 Johannesburg Surgical Hospital
☎️ (011) 794 5758

16/02/2026

Oestrogen has anti-inflammatory properties and plays an important role in tendon and joint health. During perimenopause, when oestrogen levels begin to fluctuate and decline, inflammation may increase in tissues where oestrogen receptors are present — including the rotator cuff tendons of the shoulder.

Some women notice new or worsening shoulder pain, stiffness, or tendon-related discomfort during this phase of life. This is not coincidental. Hormonal changes can influence tendon resilience, pain sensitivity, and inflammatory responses.

However, while hormonal shifts may contribute to symptoms, underlying conditions such as rotator cuff tendinopathy, impingement, or early degenerative changes should still be properly assessed.

Understanding this connection allows for a more holistic and informed approach to treatment.

If shoulder pain has developed or worsened during perimenopause, a clinical assessment can help clarify the cause and guide appropriate management.

📞 Dr Philip Mostert
📍 Johannesburg Surgical Hospital
☎️ (011) 794 5758

DrMostert JointHealth

10/02/2026

In shoulder surgery, small incisions usually refer to minimally invasive or arthroscopic techniques. These allow the shoulder joint to be treated using specialised instruments and a camera, with less disruption to surrounding tissue.

Smaller incisions can mean reduced post-operative pain, smaller scars, and a smoother recovery. It’s important to remember that small incisions don’t mean a simple procedure — the surgery itself can still be complex.

Dr Philip Mostert explains the surgical approach clearly so patients understand what to expect and feel confident about their care.

📞 Dr Philip Mostert
📍 Johannesburg Surgical Hospital
☎️ (011) 794 5758

31/01/2026

Biceps tendinitis is a common cause of pain at the front of the shoulder. It occurs when the biceps tendon becomes irritated or inflamed, often due to repetitive use, overuse, or strain. It can also be associated with other shoulder conditions such as impingement or rotator cuff problems.

Diagnosis is based on a careful clinical assessment and, when needed, imaging to evaluate the tendon and surrounding structures. This helps confirm the cause of pain and guide appropriate treatment.

Treatment is usually conservative and may include activity modification, physiotherapy, and anti-inflammatory treatment. In many cases, symptoms improve with the right care and time. Recovery depends on the severity of the irritation and how early treatment begins.

If shoulder pain persists, worsens, or starts to affect daily activities, proper assessment can help ensure the right treatment and prevent longer-term problems.

Dr Philip Mostert
Johannesburg Surgical Hospital, 2nd Floor, Suite 4
(011) 794 5758

JohannesburgSurgicalHospital BetterMovement

29/01/2026

Spending long hours at a desk can place ongoing strain on your shoulders — especially when posture or screen height isn’t right. Rounded shoulders, unsupported arms, and prolonged sitting can overload shoulder muscles and tendons over time.

Simple adjustments to your desk setup and regular movement breaks can help reduce strain and prevent shoulder pain. If discomfort persists despite these changes, it may be worth having your shoulder assessed.

Dr Philip Mostert
Johannesburg Surgical Hospital, 2nd Floor, Suite 4
(011) 794 5758

BetterMovement

22/01/2026

Shoulder replacement, or arthroplasty, is considered only after careful assessment and when conservative treatments have not provided relief. Dr Philip Mostert evaluates each patient individually, using both clinical findings and imaging to guide decision-making.

Common indications may include ongoing shoulder pain, significant loss of movement, and advanced joint changes that affect daily life or sleep, after conservative treatments have not provided relief.

Clear explanations and thoughtful planning ensure patients understand their options before any decision is made.

Dr Philip Mostert
Johannesburg Surgical Hospital, 2nd Floor, Suite 4
(011) 794 5758

19/01/2026

Many people notice their shoulder pain feels worse at night — and there are a few reasons for this.

When you lie down, inflammation around the shoulder can become more noticeable, especially if tendons or the joint are irritated. Certain sleeping positions may also place pressure on the shoulder, reducing blood flow and increasing discomfort. Conditions like rotator cuff problems, impingement, or frozen shoulder often cause night pain as an early warning sign.

If shoulder pain is regularly disturbing your sleep, it’s your body’s way of signalling that something may need attention.

Understanding these signs early can help guide the right care and improve both comfort and recovery.

Dr Philip Mostert
Johannesburg Surgical Hospital, 2nd Floor, Suite 4
(011) 794 5758

15/01/2026

Shoulder pain is common — but how it behaves over time matters. While some discomfort settles on its own, ongoing pain, weakness, or limited movement can be a sign that your shoulder needs closer attention.

Recognising these symptoms early can help guide the right care and prevent ongoing problems.

If shoulder pain is affecting your daily life or not improving, it’s worth seeking advice.

Dr Philip Mostert
Johannesburg Surgical Hospital, 2nd Floor, Suite 4
(011) 794 5758

12/01/2026

Shoulder pain is something we see often in practice, and it usually falls into one of three common conditions:

- Shoulder Impingement
Often causes pain when lifting your arm or reaching overhead. It’s commonly linked to tendon irritation and inflammation.

- Rotator Cuff Tears
These can develop gradually or after an injury, leading to weakness, pain, and difficulty lifting the arm.

- Frozen Shoulder
A condition where the shoulder becomes stiff and painful over time, with movement gradually reducing before recovery begins.

While they can feel similar at first, each has a different cause and treatment approach.

Each condition presents differently — accurate diagnosis matters. Understanding what’s happening inside the shoulder helps guide the right care and leads to better outcomes.

If shoulder pain is limiting your movement or not improving, it’s worth getting it checked.

Dr Philip Mostert
Johannesburg Surgical Hospital, 2nd Floor, Suite 4
(011) 794 5758

09/01/2026

Shoulder ultrasound is a safe and effective way to assess soft tissue structures such as tendons, muscles, and bursae. It helps identify common causes of shoulder pain like rotator cuff tears, inflammation, and bursitis — all in real time and without radiation.

Used alongside a thorough clinical assessment, shoulder ultrasound can provide clarity, guide treatment decisions, and help plan the next steps with confidence.

If shoulder pain is limiting your movement or not improving, getting the right imaging can make all the difference.

Dr Philip Mostert
Johannesburg Surgical Hospital, 2nd Floor, Suite 4
(011) 794 5758

01/01/2026

A new year is a chance to focus on your health and wellbeing.

Prioritise movement, care for your body, and take each step toward a stronger, more active you.

Wishing you a year full of strength, vitality, and happiness!

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Johannesburg Surgical Hospital, Second Floor, Suite 4
Randburg
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