With the monsoon season comes a rise in several viral and mosquito-borne illnesses, including dengue and influenza. The confusing part is that both can initially cause high fever, body aches, weakness, and fatigue, making it difficult to tell them apart based on symptoms alone.

Doctors say understanding how these infections spread and recognizing their typical symptoms can help people seek medical attention at the right time. However, testing is often necessary to confirm the diagnosis.

How Do Dengue and Swine Flu Spread?

Dengue is caused by the dengue virus and is transmitted through the bite of infected Aedes mosquitoes. These mosquitoes can breed in stagnant water around homes, including water collected in coolers, flower pots, containers, and other places.

Swine flu, commonly referring to influenza A(H1N1), is a respiratory infection that spreads mainly through respiratory droplets and close contact with an infected person. Crowded places such as schools, offices, public transport, and other enclosed spaces can facilitate its spread.

Common Symptoms of Dengue

Dengue often develops with a sudden and high fever. Other symptoms may include:

• Severe muscle and joint pain

• Intense headache

• Pain behind the eyes

• Nausea or vomiting

• Skin rash

• Weakness and extreme fatigue

• Low platelet count in some patients

The intense muscle and joint pain associated with dengue is one reason it is sometimes described as "breakbone fever."

How Are Swine Flu Symptoms Different?

Swine flu can also cause high fever and body aches, but respiratory symptoms are generally more prominent. Common symptoms include:

• Fever and chills

• Cough

• Sore throat

• Runny or blocked nose

• Headache

• Body aches

• Tiredness

• Breathing difficulties in more severe cases

Because these symptoms can resemble those of an ordinary viral infection, some people may delay seeking medical attention.

Can Symptoms Alone Confirm the Disease?

Not reliably. Dengue and influenza can have overlapping symptoms, particularly during the early stages. A doctor may recommend appropriate laboratory tests based on the patient's symptoms, exposure history, and local disease activity.

Dengue may be confirmed using blood tests such as antigen or antibody testing, depending on how long the illness has been present. Influenza can be detected using tests such as RT-PCR or other appropriate respiratory tests.

Therefore, it is better not to self-diagnose based solely on fever or body pain.

Why Should You Not Ignore Severe Symptoms?

Both illnesses can occasionally become serious.

Severe dengue can lead to bleeding, plasma leakage, shock, and organ complications. Influenza can sometimes progress to pneumonia or severe breathing problems, particularly in people at higher risk of complications.

Young children, older adults, pregnant women, and people with certain underlying medical conditions may require particular attention if they develop flu-like symptoms.

What Should You Do If You Develop a High Fever?

Do not ignore a persistent or high fever, especially if it is accompanied by severe body pain, rash, vomiting, cough, breathing difficulty, or unusual weakness.

Consult a doctor if symptoms are significant or worsening. Seek urgent medical care for warning signs such as difficulty breathing, confusion, severe weakness, persistent vomiting, bleeding, severe abdominal pain, or inability to stay hydrated.

The key takeaway is simple: dengue and swine flu can look similar at first, so proper medical evaluation and timely testing are more reliable than trying to identify the illness from symptoms alone.