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Active Traffic Construction ATC Understand your body. Learn something useful. ATCSB (Formerly Known as Active Traffic Services Sdn Bhd)

Getting out of a chair or carrying the shopping relies on muscle strength. When muscle mass and strength decline, famili...
20/10/2026

Getting out of a chair or carrying the shopping relies on muscle strength. When muscle mass and strength decline, familiar activities can gradually become more demanding.

Sarcopenia describes a loss of muscle mass and function that is often associated with ageing. It can affect mobility, but difficulty with a task does not by itself confirm the condition.

Ageing, reduced physical activity, poor nutrition and some illnesses can contribute to muscle loss. The pattern and extent vary between people; age alone does not tell the whole story.

The illustration shows the organisation of a skeletal muscle, rather than a personal measurement of muscle loss. New weakness or declining ability deserves a GP assessment.

A smooth lump near the wrist can be a ganglion cyst: a collection of fluid beneath the skin near a joint or tendon. The ...
20/10/2026

A smooth lump near the wrist can be a ganglion cyst: a collection of fluid beneath the skin near a joint or tendon. The wrist is a common place for one to appear.

These cysts are non-cancerous, but a lump cannot be identified from its appearance alone. A GP can examine it and check whether another condition might be responsible.

Many ganglion cysts cause no symptoms. Others can ache, affect movement or press on nearby tissues, sometimes causing tingling or weakness. Their size can vary.

The illustration shows one simplified example near the back of the wrist. The exact cause is not always known, and noticing a new lump is a reason to have it assessed.

A cool breeze or a moving piece of music can bring up tiny bumps on your arms. Goosebumps are an automatic response rath...
20/10/2026

A cool breeze or a moving piece of music can bring up tiny bumps on your arms. Goosebumps are an automatic response rather than something you deliberately control.

Small muscles attached to hair follicles contract, pulling the hairs more upright and slightly raising the skin around them. These muscles are called arrector pili; the illustration enlarges one so the connection is visible.

Nerves in the sympathetic nervous system control this reflex. Cold and strong emotions can both trigger it, so goosebumps do not necessarily mean you are feeling cold.

The familiar bumps explain a change in hair position. They are different from the repeated muscle contractions involved in shivering.

That blocked feeling during take-off or landing comes from changing air pressure. The air in your middle ear may not adj...
20/10/2026

That blocked feeling during take-off or landing comes from changing air pressure. The air in your middle ear may not adjust as quickly as the air around you.

The eardrum separates the ear canal from the middle ear. A narrow passage called the Eustachian tube links the middle ear to the back of the nose and upper throat, helping keep pressure balanced on either side.

Swallowing or yawning can briefly open this passage. That pressure adjustment may come with the familiar popping sensation. A cold or nasal congestion can make the tube work less effectively.

Ear discomfort has other causes too. Severe pain or symptoms that persist after flying deserve medical assessment.

HbA1c is a blood test that gives a longer view of blood glucose than a single glucose reading. It reflects average level...
19/10/2026

HbA1c is a blood test that gives a longer view of blood glucose than a single glucose reading. It reflects average levels over roughly the previous two to three months.

Glucose attaches to haemoglobin inside red blood cells. The test measures the proportion of haemoglobin with glucose attached, rather than simply measuring the sugar present in the blood at that moment.

The inset is a symbolic magnification of that attachment, not an exact molecular model. Its coloured groups explain the relationship rather than a specific number of glucose molecules.

HbA1c can help diagnose type 2 diabetes and monitor diabetes. Some conditions can affect its accuracy, so a clinician interprets the result in context.

Spinal discs sit between the bones of the spine. They have a tough outer layer and a softer centre, helping the spine co...
19/10/2026

Spinal discs sit between the bones of the spine. They have a tough outer layer and a softer centre, helping the spine cope with movement and load.

A disc can bulge beyond its usual outline. Sometimes disc material presses on a nearby nerve, contributing to pain, tingling, numbness or weakness. The location of symptoms depends on which nerve is affected.

Disc changes also occur in people without pain. A scan finding needs to be considered alongside symptoms and an examination, rather than treated as a diagnosis by itself.

Ongoing or worsening symptoms deserve assessment. New bladder or bowel control problems, or numbness around the ge****ls or bottom with back pain, require emergency medical care.

Sweat is liquid released by glands in the skin. When the body gets warm, sweating is one of the ways it can lose heat.Th...
19/10/2026

Sweat is liquid released by glands in the skin. When the body gets warm, sweating is one of the ways it can lose heat.

The important step is evaporation: liquid water changes into water vapour at the skin surface. That process takes heat away from the skin, helping cool the body. The floating blue symbols in the illustration represent invisible vapour, not droplets you can actually see rising.

Humid air makes it harder for sweat to evaporate. You can feel very sweaty while your body is cooling less efficiently.

Sweating therefore does not guarantee protection from overheating. Heat, humidity and activity all influence how effectively the body can keep its temperature under control.

Earwax is a normal part of the ear's protective system. It is made in the external ear canal and helps keep that passage...
19/10/2026

Earwax is a normal part of the ear's protective system. It is made in the external ear canal and helps keep that passage clean and protected.

Usually, wax works its way out without causing trouble. Sometimes it accumulates and blocks the canal, which can make hearing seem muffled or leave the ear feeling full.

The illustration places the wax before the eardrum, in the outer ear canal. It does not show a problem inside the hearing or balance organs.

An ear examination can check whether wax is responsible. Hearing changes can have other causes, so they should not automatically be put down to a blockage; sudden hearing loss needs urgent medical assessment.

Saliva does much more than stop the mouth feeling sticky. It moistens food, helps with swallowing and supports the prote...
18/10/2026

Saliva does much more than stop the mouth feeling sticky. It moistens food, helps with swallowing and supports the protection of teeth from decay.

The illustration shows a magnified saliva coating outside a tooth, with enamel on the crown and dentine underneath. The coating is exaggerated so it can be seen; real saliva forms a much thinner film.

When the mouth does not have enough saliva, chewing, speaking and swallowing can become uncomfortable. Persistent dryness also increases the risk of dental problems.

Medicines and some health conditions can contribute. A dentist or doctor can investigate ongoing dryness; it should not simply be accepted as an unavoidable part of getting older.

That little hic sound begins with an involuntary movement of a breathing muscle. The diaphragm is a dome-shaped sheet of...
18/10/2026

That little hic sound begins with an involuntary movement of a breathing muscle. The diaphragm is a dome-shaped sheet of muscle separating the chest from the abdomen.

During a hiccup, it suddenly contracts. This is followed by a quick closure of the vocal cords, which produces the familiar sound. You may notice a small tightening feeling in the chest, tummy or throat.

Short bouts are common and usually settle on their own. Eating a large meal or drinking fizzy drinks can be triggers, although sometimes there is no clear reason.

Hiccups that persist or interfere with eating, sleeping or breathing should be assessed. This diagram explains the mechanism rather than suggesting a home remedy.

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Loftus Street, Wollongong NSW
Wollongong, NSW
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