“The vapors” was a catch-all medical diagnosis used primarily in the 17th and 18th centuries to describe a range of symptoms including fainting, anxiety, emotional outbursts, bloating, and general feelings of distress. The term referred to a belief that toxic fumes rising from internal organs, particularly the uterus or stomach, traveled through the body and disrupted the brain and nerves. It was not a single illness but a label applied to almost any unexplained physical or emotional complaint, especially in women.
What Doctors Believed Was Happening
The underlying theory was rooted in ancient humoral medicine, the idea that health depended on a balance of fluids in the body. Physicians believed that organs could produce harmful gases or “vapors” that rose upward through the body, eventually reaching the brain and causing mental and physical symptoms. One prominent theory held that the nerves were “shrinking because of drying,” and that prolonged bathing was the appropriate treatment to restore moisture and calm the nervous system.
By the mid-1700s, the French physician Joseph Raulin described hysteria as an “affection vaporeuse,” linking it to the foul air of large cities and what he called an “unruly social life.” In his view, the disorder could technically affect both sexes, but women were considered more vulnerable because they were thought to be naturally more idle and emotionally reactive. This framing made “the vapors” less a neutral diagnosis and more a judgment about temperament, gender, and lifestyle.
Symptoms Blamed on the Vapors
Because “the vapors” was not a specific disease, the symptoms attributed to it were enormously broad. A woman who fainted at a social event, experienced sudden weeping, complained of stomach pain, felt short of breath, or had a panic episode could all receive the same diagnosis. Headaches, dizziness, chest tightness, irritability, and melancholy were commonly grouped under the label. In literature and personal letters from the period, “having the vapors” often described someone who was overwhelmed, emotionally fragile, or prone to dramatic reactions.
The vagueness of the diagnosis was part of its appeal to physicians of the era. It provided a convenient explanation for any complaint they could not otherwise identify, and it reinforced prevailing ideas about women’s bodies being inherently unstable. Men occasionally received the diagnosis too, but it carried far less social stigma when applied to them and was more often described as a nervous complaint or melancholia.
How the Vapors Were Treated
Smelling salts were the most iconic remedy. These were crystallized ammonium carbonate, originally called “salt of hartshorn” (because they were first derived from deer antlers), later mixed with perfumes and marketed as smelling salts. Waving them under the nose of someone who had fainted or become overwhelmed was standard practice. The sharp ammonia fumes irritated the nasal passages and triggered a reflexive inhalation, which could rouse someone from a faint.
Beyond smelling salts, treatments ranged widely. Physicians recommended warm baths, cold water dashed against the chest and face, vigorous rubbing of the limbs, and applications of hot flannels or heated bricks to the armpits, stomach, and soles of the feet. Once a patient was conscious and able to swallow, warm brandy, wine, or coffee might be administered. Mustard plasters applied to the chest were used to relieve labored breathing. Tickling the throat with a feather was another technique meant to stimulate the body back to alertness.
Lifestyle prescriptions were also common. Women diagnosed with the vapors might be told to avoid excitement, stay out of city air, rest extensively, or take long baths. Some physicians prescribed laudanum (an opium tincture) or herbal tonics. The treatments reveal how little was understood about the actual causes of these symptoms.
The Vapors and Hysteria
The vapors overlapped heavily with “hysteria,” another diagnosis with roots in ancient Greek medicine. Hysteria took its name from the Greek word for uterus, and for centuries physicians attributed it exclusively to a malfunctioning womb. The vapors was essentially a broader, more socially polite version of the same idea. A woman of high social standing might be said to have “the vapors,” while a lower-class woman with similar symptoms was more likely to be labeled hysterical.
Both diagnoses served a similar cultural function: they pathologized women’s emotions and provided a medical framework for dismissing complaints that doctors could not explain. The two terms were used somewhat interchangeably through the 18th century, though “the vapors” gradually fell out of medical use while hysteria persisted well into the 20th century.
What These Conditions Are Called Today
Modern medicine has broken apart what was once lumped under “the vapors” into many distinct diagnoses. The symptoms historically attributed to the vapors now map onto conditions like panic disorder, generalized anxiety, clinical depression, vasovagal syncope (a common cause of fainting triggered by stress), and various somatic symptom disorders where emotional distress manifests as physical complaints like pain, fatigue, or digestive problems.
The old concept of hysteria specifically gave rise to several modern psychiatric categories. Conversion disorder describes neurological symptoms like paralysis or seizures with no identifiable physical cause. Somatic symptom disorder covers persistent physical complaints driven by excessive anxiety about health. Histrionic personality disorder, which first appeared in the DSM-II, remains the only current diagnosis that retains a name directly derived from the ancient concept of hysteria.
The key difference is that modern diagnoses attempt to identify specific mechanisms rather than attributing everything to wandering vapors or a misbehaving uterus. What 18th-century doctors saw as one vague condition, today’s clinicians recognize as dozens of distinct disorders with different causes, different brain chemistry, and different treatments.