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Haze is something many of us in Singapore are familiar with.
It often starts subtly. A faint burning smell in the air, a slightly grey sky, maybe a dry throat that does not quite go away. Some days, you might not even notice it immediately, until your body starts reacting.
While it may seem like a temporary inconvenience, haze can have a deeper impact on your health, especially when exposure becomes more frequent.
What Is Haze?
Haze is made up of fine particles known as PM2.5. These particles are extremely small and can bypass your body’s natural defenses.
Because of their size, they can travel deep into your lungs and even enter your bloodstream. Over time, this can affect multiple systems in your body, not just your breathing.
In Singapore, haze is usually caused by regional forest fires. When winds shift, smoke is carried across borders and affects our air quality.
Why Haze Is Becoming More Relevant Today
Haze is no longer something that happens once every few years.
In fact, even recently:
- •In March 2026, many Singaporeans noticed a burning smell in the air and hazy conditions, linked to hot spots detected in Johor, as highlighted in local news coverage of the NEA update.
- •Air quality readings reached the moderate range (PSI around 50–59), not considered severe, but enough for people to start feeling throat irritation and discomfort.
- •There have also been multiple haze episodes early in the year, suggesting that this is becoming a more regular occurrence.
This means that even when haze is not at extreme levels, it can still affect how your body feels on a daily basis.
To put those numbers into context, it helps to understand what PSI levels actually mean and how they are commonly interpreted in Singapore.
What Do PSI Levels Mean in Singapore?
Understanding PSI levels can help you make better sense of air quality readings during haze periods, especially when the air does not look severe but your body still feels the effects.
| PSI Level | Air Quality | What This Means for You |
|---|---|---|
| 0–50 | Good | Outdoor activities are generally safe for most people. |
| 51–100 | Moderate | Normal activities can continue, but sensitive individuals should monitor symptoms. |
| 101–200 | Unhealthy | Reduce prolonged or strenuous outdoor activity, especially for vulnerable groups. |
| 201–300 | Very Unhealthy | Avoid prolonged outdoor activity. Consider wearing a mask if outdoors. |
| Above 300 | Hazardous | Stay indoors as much as possible and minimise outdoor exposure. |
This guide is based on the 24-hour PSI used in Singapore. For real-time conditions, 1-hour PM2.5 readings may provide more immediate insight.
Source: National Environment Agency (NEA)
Signs Your Body May Be Affected by Haze
The effects of haze are not always obvious at first. In many cases, the signs show up gradually.
You may notice:
- ✓Dry or irritated throat
- ✓Frequent coughing
- ✓Slight discomfort when breathing
- ✓Feeling more tired than usual
- ✓Increased sensitivity to illness
These symptoms can appear even with moderate exposure, especially when it continues over several days.
How Haze Affects Your Body
Respiratory System
Your airways are the first to be affected. Fine particles can irritate the lining of your throat and lungs, leading to discomfort, coughing, and breathing sensitivity.
Circulation and Heart Health
Because PM2.5 particles are so small, they can enter the bloodstream. This may contribute to inflammation in the body and place additional strain on your cardiovascular system over time.
Energy and Immunity
When your body is constantly exposed to polluted air, it has to work harder to cope. This can lead to lower energy levels, a weakened immune response, and increased susceptibility to infections. The body’s systems are closely connected, so ongoing stress in one area can affect overall wellbeing.
Who Should Take Extra Precautions?
While haze affects everyone, some groups may be more sensitive:
- ✓Children and elderly
- ✓Pregnant women
- ✓Individuals with respiratory or heart conditions
For these individuals, even moderate haze levels can have a stronger impact on daily comfort and health.
Everyday Ways to Protect Yourself During Haze
The good news is that a few simple habits can go a long way in reducing how much haze affects you day to day.
Stay Aware of Air Quality
Checking daily air quality updates helps you make better decisions about your plans, especially if you are spending extended time outdoors. If you are more sensitive to haze, pay attention to both the readings and how your body feels.
Adjust Outdoor Activities
Reduce prolonged outdoor exposure, especially during hazy periods. Avoid intense exercise outdoors when air quality is not ideal.
Stay Hydrated
Drinking enough water helps soothe your throat and supports your body’s natural recovery process.
Support Your Body From Within
External protection like masks and staying indoors can reduce exposure, but they do not fully address what happens internally. Supporting your body, especially your respiratory system, can help you cope better during haze periods.
Supporting Your Airways Naturally
Your airways play an important role in filtering what you breathe in. During haze periods, they are under more strain than usual.
Supporting your respiratory system may help maintain clear and comfortable breathing, support overall airway function, and improve your resilience during periods of environmental stress.
LABO Nutrition Airwayz
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Frequently Asked Questions
Is haze harmful even when PSI levels are moderate?
Yes. Even when PSI levels are in the moderate range (51–100), some individuals may still experience symptoms such as throat irritation, coughing, or discomfort. Prolonged exposure can also place stress on the body over time.
What are the common signs that haze is affecting your body?
Common signs include a dry or sore throat, frequent coughing, slight breathing discomfort, and feeling more tired than usual. Some people may also become more sensitive to illness during haze periods.
How can I protect my health during haze season?
You can reduce the impact of haze by staying aware of air quality levels, limiting prolonged outdoor exposure, staying well hydrated, and supporting your body with proper nutrition to maintain respiratory health and overall resilience.
