White spots in the esophagus are most commonly caused by a fungal infection called esophageal candidiasis, which accounts for 88% of all infectious esophagitis cases. But fungal overgrowth isn’t the only explanation. Several other conditions produce white patches, specks, or raised spots on the esophageal lining, ranging from harmless tissue changes to allergic inflammation. What’s behind yours depends on the size, shape, and distribution of the spots, along with your overall health.
Candida Infection: The Most Common Cause
Candida albicans is a yeast that normally lives in small amounts in your mouth, gut, and throat. When something disrupts the balance, typically a weakened immune system, the yeast multiplies and clings to the esophageal lining. It forms white or yellowish plaques that are firmly attached to the tissue. During an endoscopy, these plaques don’t wash away with water irrigation, which is one way doctors distinguish them from loose debris.
The plaques can appear anywhere along the esophagus or spread throughout its entire length. In some cases, the underlying tissue shows small ulcers or breaks beneath the coating. Esophageal candidiasis shows up in roughly 0.3% to 5.2% of the general population, but the rate jumps to about 9.8% in people living with HIV. Other risk factors include taking antibiotics or corticosteroids (including inhaled steroids for asthma), diabetes, chemotherapy, and any condition that suppresses your immune system.
Treatment is straightforward. An antifungal medication taken by mouth for at least three weeks clears most infections. You’ll typically start with a higher dose on the first day, then continue at a lower daily dose until the course is finished. Most people notice improvement in swallowing and pain within the first week, though completing the full course matters to prevent the infection from coming back.
Eosinophilic Esophagitis
Eosinophilic esophagitis (EoE) is an allergic condition that can look strikingly similar to a fungal infection on camera. It produces tiny white pinpoint specks or granular patches scattered across the esophageal lining, sometimes described as looking like someone sprinkled salt on the tissue. These white spots are actually clusters of immune cells called eosinophils that have gathered in the tissue and formed small abscesses just beneath the surface.
Unlike candida, EoE is driven by allergic inflammation rather than infection. Common food triggers include milk, wheat, eggs, and soy, though the specific culprit varies from person to person. The condition also produces other visible signs: vertical furrows running along the esophageal wall, tissue that looks ringed or corrugated, and in long-standing cases, narrowing that can trap food. Diagnosis requires a biopsy showing at least 15 eosinophils in a single high-power microscope field, combined with symptoms like difficulty swallowing, food getting stuck, or chest pain.
EoE is increasingly recognized in both children and adults. Management typically involves identifying and eliminating dietary triggers, or using medications that calm the allergic response in the esophageal lining. Many people cycle through elimination diets, removing the most common trigger foods and reintroducing them one at a time to find the source.
Glycogenic Acanthosis
Not all white spots signal a problem. Glycogenic acanthosis is a completely benign condition where small, raised, whitish nodules dot the esophageal lining. These nodules are typically round or oval, under 1 centimeter across, and uniform in size. They appear because the surface cells of the esophagus have accumulated extra glycogen (a stored form of sugar) and thickened slightly.
This finding turns up in about 3.5% of routine upper endoscopies. It requires no treatment and carries no cancer risk. The nodules are usually discovered incidentally during a procedure done for another reason, and many people never know they have them. If your endoscopy report mentions glycogenic acanthosis, it’s essentially a normal variant.
Herpes Esophagitis
Herpes simplex virus (HSV) can infect the esophagus and produce white patches, though it accounts for only about 10% of infectious esophagitis cases compared to candida’s 88%. The appearance differs from fungal plaques: herpes esophagitis typically shows up as multiple shallow ulcers with fragile, easily bleeding tissue and white exudates, concentrated in the middle to lower esophagus.
While herpes esophagitis is most common in people with compromised immune systems, it can occasionally occur in otherwise healthy individuals. The ulcers tend to cause significant pain with swallowing and sometimes chest pain. Antiviral medications are the standard treatment, and most cases resolve within a few weeks.
Pill-Induced Esophagitis
Certain medications can damage the esophageal lining directly if they dissolve too slowly or get stuck on the way down. The resulting irritation can produce whitish erosions or pale patches at the injury site, along with pain behind the breastbone and difficulty swallowing.
The medications most likely to cause this include some antibiotics (doxycycline, tetracycline, clindamycin), osteoporosis drugs (alendronate), iron supplements, potassium supplements, and aspirin. Doxycycline, tetracycline, and iron supplements are particularly irritating because they create a highly acidic environment once they dissolve. The injury usually happens when pills are taken with too little water, swallowed right before lying down, or taken without food when food is recommended.
Prevention is simpler than treatment: take these medications with a full glass of water and stay upright for at least 30 minutes afterward. If pill esophagitis has already developed, the damage usually heals on its own once the offending medication is stopped or the way it’s taken is adjusted. Anti-inflammatory pain relievers should be avoided during healing, as they can worsen the irritation.
How Doctors Tell Them Apart
The appearance of white spots alone doesn’t give a definitive answer. Candida plaques tend to be larger, confluent, and firmly stuck to the wall. EoE spots are finer and more granular, often accompanied by rings or furrows. Glycogenic acanthosis nodules are discrete, uniform, and sit on otherwise healthy-looking tissue. Herpes lesions have a more ulcerated, raw appearance.
Biopsy during endoscopy is the most reliable way to distinguish these conditions. A small tissue sample examined under a microscope can identify fungal organisms, eosinophil clusters, viral changes, or benign glycogen accumulation. In most cases, the combination of visual pattern and biopsy results gives a clear diagnosis, and treatment can be tailored to the specific cause.