Helicobacter pylori (H. pylori) infects the cells of the stomach lining, causing production of a toxin and subsequent inflammation that can lead to a variety of symptoms and signs. The clinical picture is very variable in that some people who are infected do not have any symptoms. Others may have mild symptoms, while others develop severe symptoms and ulcers.
Mild symptoms of H. pylori infection are
In more severe cases, those affected by H. pylori may experience
- vomiting blood,
- dark stool (from bleeding into the gastrointestinal tract),
- anemia (from red blood cell loss due to bleeding),
- bad breath,
- worsening abdominal pain.
Causes of Helicobacter pylori (H. pylori) infection
H. pylori is a type of bacteria that can invade the lining of the stomach, causing an infection. The inflammation results from production of a toxin known as vacuolating cytotoxin A (Vac-A). The inflammation can lead to ulcer formation.
Other helicobacter pylori (h. pylori) symptoms and signs
- Abdominal Pain
- Appetite Loss or Decreased Appetite
- Bad Breath
- Burning Abdominal Pain
- Difficulty Swallowing
- Pain When Stomach Is Empty
- Tarry or Black Stools
- Vomiting Blood (Hematemesis)
- Weight Loss
Main Article on Helicobacter pylori (H. pylori) Symptoms and Signs
Pictures, Images, Illustrations & Quizzes
16 Foods That Boost and Improve Your Immune System
Help fight colds, flu, as well as viruses like coronavirus with foods that boost and improve your immune system. Reach for...
Digestive Disorders: Common Misconceptions
Learn about the digestive system and common misconceptions of digestive disorders. Read about what causes ulcers, heartburn,...
Is It Contagious? What Diseases Are Contagious?
Is it contagious? Take this quiz to learn about contagious diseases, how contagious diseases are spread, and myths and facts...
Stomach Pain Quiz: Nausea & Other Causes
Tummy Troubles? Get a better idea of what's causing the nausea, vomiting, bloating, gas, constipation, diarrhea, pain, and other...
Examples of Medications for Helicobacter pylori (H. pylori) Symptoms and Signs
- amoxicillin (Amoxil, Moxatag, Larotid)
- Amoxicillin vs. Ceftin
- Amoxicillin vs. Penicillin
- Bactrim vs. Cefdinir
- bismuth subsalicylate (Pepto Bismol, Kaopectate)
- Cipro (ciprofloxacin) Side Effects, Warnings, and Interactions
- clarithromycin, Biaxin
- Doxycycline vs. Azithromycin
- Doxycycline vs. Bactrim
- Doxycycline vs. Cipro
- esomeprazole (Nexium)
- Keflex vs. Penicillin
- Levaquin vs. Zosyn
- metronidazole (Flagyl, Flagyl ER) Antibiotic
- omeprazole (Prilosec, Zegerid)
- tetracycline (Sumycin)
Digestive Disorders Resources
Subscribe to MedicineNet's General Health Newsletter