Cotton fever is a sudden fever that follows intravenous drug use, produced by bacteria and endotoxins carried into the bloodstream on cotton filters. Most cases resolve within 12 hours.
Cotton fever takes its name from the cotton filters used during injection. The filters carry bacteria and other contaminants into the bloodstream, which produces the symptoms set out below.
Knowing the causes, the symptoms and the treatment matters for anyone at risk and for the people caring for them, because early intervention improves the outcome.
What Is Cotton Fever?
Cotton fever is an illness produced when bacteria-contaminated cotton fibers enter the bloodstream during intravenous drug use, producing high fever, rapid heart rate and general weakness.
Most cases of cotton fever resolve within 12 hours. The discomfort and the complications still mark the danger of injecting drugs with non-sterile materials. An untreated infection produces more serious health problems, which is why medical attention and safer injection practices matter.
The bacteria responsible for cotton fever live on cotton plants and survive on cotton filters. The bacteria enter the bloodstream and trigger an immune response, and that response is what produces the fever and malaise.
Cotton fever is self-limiting in most cases. Repeated episodes still produce significant distress and lead to more serious infections where they go unaddressed, which is why sterile equipment matters and why persistent or worsening symptoms need medical help.
What Are Intravenous (IV) Drugs?
Intravenous drugs are substances injected directly into a vein, which delivers them into the bloodstream fastest and carries the highest risk of infection and overdose.
Intravenous (IV) drug use injects a substance directly into the veins with a syringe. That route delivers the substance into the bloodstream quickly, which produces a rapid onset of effects. The IV drugs people misuse most are heroin, methamphetamine and prescription opioids. The same speed that intensifies the drug’s effect also raises the risk of infection, overdose and other serious health complications.
Injection produces the fastest effects and introduces toxins directly into the bloodstream, which other routes of administration do not. Heroin and cocaine reach the person at an unknown purity, which exposes them to foreign compounds that damage health and end life.
Recreational IV drug use carries extreme risks including overdose and relapse, and those risks turn fatal. IV substance use disorder is one of the most serious forms of drug use for that reason.
What Are the Complications of Using IV Drugs?
IV drug use shortens the average lifespan of a person who injects heroin by more than 18 years, and contaminated needles transmit HIV and hepatitis.
IV drug use produces complications well beyond cotton fever, which is temporary.
The largest is the reduction in life expectancy. Research published in the National Library of Medicine records that intravenous heroin use shortens the average lifespan by more than 18 years.
Contaminated needles raise the risk of contracting bloodborne diseases including HIV and hepatitis, both of which carry severe and fatal outcomes. The health effects of IV drug use are substantial, and treatment remains available at every stage.
What Causes Cotton Fever?
Contaminated cotton used to filter an injection causes cotton fever, and researchers hold 5 theories for the mechanism, of which bacterial endotoxin is the leading one.
Bacteria from the cotton, or from the drug solution itself, enter the bloodstream and produce the infection behind the symptoms. Cotton fever is most common among people who inject drugs with non-sterile techniques or equipment.
Research has not settled the exact mechanism. There are 5 theories:
- Immune response to cotton. The immune system reacts to foreign particles in the bloodstream, and it detects cotton as a foreign substance. That immune response produces a fever.
- Pharmacologic reaction. Cotton particles react with chemicals in the drugs, and that chemical reaction triggers fever and other symptoms.
- Bacterial contamination, the endotoxin theory. Bacteria such as Enterobacter agglomerans survive on cotton fibers. Injected into the bloodstream, those bacteria release endotoxins that trigger an immune response and produce fever.
- Contaminated cotton. Cotton filters carrying bacteria or other pathogens introduce those organisms directly into the bloodstream.
- Non-sterile injection practices. Sharing needles and using unclean equipment raise the risk of introducing bacteria and cotton fibers into the bloodstream.
Cotton fever is a serious condition whichever mechanism produces it. The condition marks the dangers of intravenous drug use and the need for sterile injection practices.
What Are the Symptoms of Cotton Fever?
Cotton fever produces 6 symptoms: high fever, abdominal pain, severe headache, shakes and chills, chest pain, and an elevated heart and respiratory rate.
Symptoms appear at different points, and cotton fever has not been studied extensively enough to fix a definitive list. Not everyone develops every symptom below, and some symptoms carry more weight than others.
There are 6 common symptoms of cotton fever:
- High fever
- Abdominal pain, aches and cramps
- Severe, pounding headache
- Shakes and chills that persist for hours
- Intermittent and recurrent chest pain
- Elevated heart rate (tachycardia) and respiratory rate, alongside other altered vital signs
Clinicians diagnose cotton fever from a history and a physical exam. A person who uses IV drugs and develops the symptoms above shortly afterward meets the diagnosis. Other conditions produce many of the same symptoms, and few produce them immediately after IV drug use, which is what makes the timing diagnostic.
How Is Cotton Fever Diagnosed?
Clinicians diagnose cotton fever from the symptoms and the person’s history of drug use, and run blood tests to rule out a bacterial infection.
Diagnosis rests on a medical evaluation of the symptoms above alongside the person’s drug use history. Medical professionals run blood tests to check for bacterial infection and to rule out other causes of the same symptoms. A prompt and accurate diagnosis is what makes treatment effective.
How Is Cotton Fever Treated?
Cotton fever is self-limiting and resolves within 12 hours. Treatment addresses the symptoms: anti-inflammatories for the fever, fluids, and rest. Antibiotics are unnecessary in most cases.
Cotton fever resolves without extensive intervention, which is what self-limited means. Treatment therefore addresses the symptoms rather than the cause, and keeping the person comfortable as the symptoms dissipate maximizes the chance of full recovery.
The condition clears within 12 hours. Antibiotics are unnecessary to address the fever, because the symptoms are a manifestation of the immune response whether or not bacteria are present in the bloodstream.
There are 5 treatment options for cotton fever:
- Over-the-counter anti-inflammatory medication for the fever
- Cool rags and cloths for comfort as the fever passes
- Over-the-counter medication for headache
- Water and electrolytes to maintain hydration against the fever
- Rest, to let the body recover
Everyone with cotton fever needs monitoring as the condition runs its course, because it appears shortly after IV drug use and other complications develop alongside it that warrant intervention.
When Should You Seek Medical Help for Cotton Fever?
Seek medical attention immediately for a fever, rapid heart rate, chills or severe discomfort after injecting drugs. Delayed treatment produces severe infection and sepsis, which are life-threatening.
Cotton fever after IV drug use is common. IV drug use is a severe form of substance use disorder that needs treatment in its own right. Cotton fever is self-limiting, and other complications develop alongside it that are more severe, which is why a comprehensive plan matters, including the help a person needs to get sober and stay sober.
Seek medical attention immediately where you or someone you know shows symptoms of cotton fever after injecting drugs. High fever, rapid heart rate, chills and severe discomfort are clear indicators that medical help is needed, and early treatment prevents complications and shortens recovery.
Delayed treatment produces more serious health problems including severe infection and sepsis, both of which are life-threatening. Symptoms that appear minor at the outset still warrant attention, because prompt medical care reduces the risk of long-term damage.
Medical professionals also advise on safer injection practices to prevent a recurrence, and connect people to resources and support for substance use disorder, which addresses the cause rather than the episode.
Why Is Mental Health Treatment Necessary?
Drug injection produces medical complications, and mental health treatment addresses the reason a person injects in the first place.
Drug injection produces a range of medical complications, and the underlying reason a person uses IV drugs needs addressing alongside them. That means mental health treatment directed at substance use disorder and addiction.
Anyone using IV drugs starts with detox under medical supervision. Clinicians treat the withdrawal symptoms with supportive care, which is what makes clearing all traces of the drug from the bloodstream manageable.
People who use IV drugs then work with treatment professionals to build the coping skills that prevent relapse. Group therapy sessions are one route, where people learn from the experience of others and take away ideas for changing the behavioral patterns that led to IV drug use.
Where Can You Get Treatment for IV Drug Use in Tampa?
Riverside Recovery of Tampa treats IV substance use disorder in Tampa, Florida, from medically supervised detox through therapy and relapse prevention.
Recognizing the symptoms of cotton fever, seeking treatment promptly and adopting sterile injection practices reduce the risk of the condition returning.
Where you or a loved one is experiencing symptoms of cotton fever or struggling with drug use, contact our team at Riverside Recovery of Tampa today to learn more about our treatment programs.