It was almost midnight when Dona Maria, 58 years old, felt a sharp and immediate pain in her right foot when putting on her shoe. In seconds, the burning sensation took over the entire region and she began to sweat cold. Her son found a yellow scorpion on the floor, near the shoe. The first impulse was to give the mother sugar water and wait for it to pass. Less than an hour later, she was experiencing intense vomiting, accelerated heart rate, and difficulty breathing, ending up in the ICU.

Dona Maria's story is not uncommon. Brazil records more than one million scorpion accidents per year, according to the Ministry of Health. The main error that puts lives at risk is always the same: the delay in seeking medical care and the wrong measures taken instead of the right ones.

The Most Dangerous Scorpion in Brazil

There are about 160 species of scorpions in Brazil, but only some represent a real risk to human health. The most dangerous is the Tityus serrulatus, popularly called the yellow scorpion.

Characteristics of the Yellow Scorpion

  • Yellowish color
  • Measures between 6 and 7 centimeters
  • Responsible for the vast majority of severe cases and deaths in the country
  • Does not live only in the countryside: it is an urban animal par excellence

Where the Yellow Scorpion Hides

  • Rubble
  • Piles of bricks
  • Stacked cardboard
  • Drains
  • Wall gaps
  • Clothes left on the floor
  • Shoes
  • Towels

Other Dangerous Species

Other species can also sting and cause serious reactions:

  • Tityus bahiensis — black scorpion
  • Tityus stigmurus — more common in the Northeast

Important rule: every scorpion bite, regardless of species, deserves immediate medical attention.

What the Venom Does to Your Body

Scorpion venom is a mixture of highly active proteins, called neurotoxins. They act mainly on the nervous system, forcing nerves to fire signals in an uncontrolled manner.

The result is a true storm in the organism:

  • Heart accelerates
  • Salivary and sweat glands go into overdrive
  • Pancreas can be affected
  • Lungs can accumulate fluid
  • Heart, in the most severe cases, can fail

Everything starts quickly. Pain is the first sign and is usually intense from the very first moment.

Recognizing the Symptoms: From Mild to Severe

The symptoms of a scorpion bite are divided into local (those that remain at the bite site) and systemic (those that affect the entire body).

Local Symptoms

  • Immediate and intense pain
  • Burning or stinging sensation
  • Tingling (as if the area were "falling asleep")
  • Mild redness
  • In some cases, discrete swelling

Unlike a bee sting, there is rarely very large edema at the site.

Systemic Symptoms (Venom Spreading Through the Body)

  • Intense sweating
  • Nausea and vomiting
  • Excessive salivation
  • Agitation
  • Feeling of anxiety
  • Accelerated heart rate (tachycardia)
  • Elevated blood pressure
  • Tremors
  • Blurred vision
  • Difficulty swallowing

More Severe Cases (Especially in Children and the Elderly)

The progression can be rapid to:

  • Acute pulmonary edema (lungs fill with fluid)
  • Shock
  • Seizures
  • Coma

Medical Classification of Severity

Doctors classify the scorpion accident into three degrees:

  • Mild degree: only local pain and tingling, with no symptoms in the rest of the body
  • Moderate degree: systemic symptoms present, but without serious organ compromise
  • Severe degree: signs of cardiovascular failure, pulmonary edema, seizures, or coma

This classification is made by the doctor during care and will directly determine the necessary treatment.

What to Do Immediately After the Bite

First and most important step: go to an emergency room or urgent care immediately, without wasting time.

Do not wait for symptoms to worsen. There is no effective home treatment against scorpion venom.

Correct Measures While Going to Care

  • Keep the bitten area elevated, if possible
  • Apply a cold compress (not ice directly on the skin) to help relieve local pain
  • Drink water normally if you are not nauseous
  • Rest

What Should NEVER Be Done

  • Do not apply a tourniquet (that tied around the limb)
  • Do not cut or suck the bite site
  • Do not apply dirt, coffee grounds, leaves, or any home substance to the wound
  • Do not apply alcohol or any product directly to the bitten skin
  • Do not give any home remedy on your own

These practices have no effect against the venom and can even cause infection or delay proper treatment.

Should You Take the Scorpion to the Hospital?

Whenever possible to capture the scorpion safely — that is, without putting anyone else at risk — take it to medical care in a closed container, such as a jar with a lid. This helps the doctor identify the species and better estimate the severity of the case.

However, never risk a second bite trying to capture the animal. If it is not safe, go to care without it. The doctor will evaluate and treat based on symptoms, regardless of whether they have the scorpion in hand or not.

If You Are Far From the Hospital

If you are in a rural area, far from a health service, the guidance is the same: go to medical care as quickly as possible.

While traveling:

  • Keep the bitten person at rest, preferably lying down
  • Accompany them constantly and under continuous observation
  • Monitor vital signs

If they begin to:

  • Vomit
  • Have difficulty breathing
  • Lose consciousness
  • Convulse

Call SAMU (192) immediately and describe the situation. They can guide what to do remotely and arrange the nearest care.

Do not waste time with alternatives: the antidote can only be applied in a hospital setting, by trained personnel.

At the Hospital: What Exams Are Requested?

Medical care begins with a complete clinical evaluation. Depending on the patient's condition, a series of tests may be requested to assess how the venom is affecting the organs.

Main Exams

  • Complete blood count
  • Blood glucose — scorpion bite frequently causes elevated blood sugar
  • Electrolyte dosage — sodium and potassium
  • Renal function — urea and creatinine
  • Amylase and lipase — to evaluate the pancreas, which can be affected
  • Muscle enzymes — such as creatine kinase
  • Electrocardiogram — to monitor the heart
  • Chest X-ray — in cases where pulmonary edema is suspected
  • Arterial blood gas — in severe cases, to assess blood oxygenation

The pediatrician or clinician uses these exams together with symptoms to define the degree of severity and, with that, the therapeutic approach.

The Anti-Scorpion Serum: How It Works and When It Is Indicated

The antidote against scorpion venom is the Anti-Scorpion Serum (SAE).

Production and Distribution

  • Produced mainly by the Butantan Institute (São Paulo) and the Ezequiel Dias Foundation (FUNED, Minas Gerais)
  • Distributed free of charge by the Unified Health System (SUS)
  • Should be available in public hospitals and emergency rooms

How It Works

The serum is made from antibodies that neutralize scorpion venom toxins. It is applied directly into the vein, in a hospital setting, with the patient monitored.

Dosage

The amount of vials administered depends on the degree of severity of the case:

  • Moderate cases: around 3 vials
  • Severe cases: 6 or more vials, always according to the Ministry of Health protocol and the clinical judgment of the medical team

Mild Cases

In cases classified as mild, the serum is generally not necessary. Treatment is limited to pain control with analgesics and observation for a few hours to ensure that the condition does not progress to moderate or severe.

Adverse Reactions to the Serum: What Can Happen

Like any biological product, anti-scorpion serum can cause adverse reactions in some patients.

Most Common Reactions

  • Urticaria — those reddish patches with itching on the skin
  • Generalized itching
  • Swelling in some parts of the body

Rare But Severe Reactions

In rarer cases, an anaphylactic reaction can occur — a severe and rapid-onset allergic response, with:

  • Drop in blood pressure
  • Difficulty breathing
  • Circulatory collapse

Why the Serum Is Still Necessary

The serum is always administered inside the hospital, with the patient monitored and with all the necessary structure to treat possible reactions. The medical team is prepared for this.

In situations of greater risk, a premedication may be administered to reduce the chance of allergic reaction. The benefits of the serum in moderate and severe cases far outweigh the risks of adverse reactions.

Who Is at Greater Risk: Special Attention Groups

Small Children

Children under seven years old are the most vulnerable to scorpion bites.

This occurs because the smaller body weight means that the amount of venom is proportionally much greater relative to body size, making progression to severe cases much faster.

Any child bitten by a scorpion should be taken to the emergency room immediately, regardless of whether initial symptoms appear mild.

The Elderly

The elderly, especially those with pre-existing cardiovascular disease, also have a higher risk of progressing to severe conditions. The already weakened heart tends to respond more intensely to the stress that the venom places on the circulatory system.

Other At-Risk Groups

  • Pregnant women
  • Immunocompromised people

All these groups deserve increased attention and prompt care.

How to Prevent Scorpion Accidents at Home

Prevention begins with knowledge of the scorpion's habitat.

Cleaning and Organization

  • Keep the house clean and free of rubble accumulation
  • Avoid cardboard, old tiles, or construction material in the yard
  • Keep trash in closed containers

Physical Protection

  • Seal cracks and fissures in walls
  • Place screens on drains and storm drains

Care With Clothes and Footwear

  • Use plastic bags to store clothes and footwear that remain stationary for long periods
  • Check before using
  • Shake clothes and towels before wearing

When Handling Risk Areas

  • Use gloves when handling rubble or garden

Cockroach Control

  • Keep the house clean, as the scorpion follows the path of cockroaches, which are its preferred food

If You Find a Scorpion at Home

  • Do not step on it: this can provoke a reflexive bite
  • Use a container and a spoon to capture it
  • Contact your municipality's Zoonoses department for proper disposal

In Summary: What You Need to Know

  • Scorpion bite is a medical emergency. Go to the emergency room immediately, even if initial symptoms seem mild
  • Do not waste time with home remedies or tourniquets
  • If possible, take the scorpion in a closed container
  • Children should be taken with maximum urgency
  • The antidote is called Anti-Scorpion Serum and is available free of charge through the SUS
  • When treated in time, treatment is highly effective and saves lives

This content is informational in nature and does not replace medical consultation. Seek medical care in case of scorpion bite.

Dr. Rebeca Soares Andrade
CRM-GO 39335