Ulcer: A Complete Medical Guide for Patients

An ulcer is an open sore that develops when tissue lining the body is damaged. In everyday use, the word often refers to peptic ulcers in the stomach or first part of the small intestine, but ulcers can also affect the mouth, skin, and other areas.

Overview: what an ulcer is

An ulcer is an open sore that forms when the body’s protective surface breaks down and the underlying tissue becomes irritated or inflamed. The term can describe sores in different parts of the body, including the stomach, small intestine, mouth, legs, feet, or pressure points on the skin. Because the causes and treatments differ, understanding the location of the ulcer is an important first step.

When people say “ulcer,” they often mean a peptic ulcer. This is a sore in the lining of the stomach or the first part of the small intestine, called the duodenum. A stomach ulcer is called a gastric ulcer, while an ulcer in the duodenum is called a duodenal ulcer. These ulcers can cause pain, indigestion, or bleeding, but some people have no clear symptoms.

Other ulcers have different causes. Mouth ulcers are usually small sores inside the lips, cheeks, or tongue. Skin ulcers may develop because of poor circulation, diabetes, pressure, or infection. A helpful evaluation focuses not only on the sore itself but also on the reason it formed, because long-term healing depends on treating the cause.

Common symptoms of an ulcer

Symptoms depend on where the ulcer is located. In peptic ulcer disease, the most typical symptom is a burning or gnawing pain in the upper abdomen. This discomfort may come and go, appear between meals, or wake a person at night. Some people also notice bloating, nausea, early fullness, belching, or reduced appetite.

Not all peptic ulcers are painful. In some cases, the first sign is a complication such as bleeding. Warning symptoms can include black or tarry stools, vomiting blood or material that looks like coffee grounds, dizziness, weakness, or fainting. These symptoms need prompt medical attention.

Mouth ulcers usually appear as small round or oval sores with a pale center and red border. They may sting during eating, drinking, or tooth brushing. Skin ulcers often look like shallow or deeper wounds that heal slowly, may drain fluid, and can be painful or numb depending on the cause.

• Peptic ulcer symptoms: upper abdominal pain, nausea, bloating, fullness
• Mouth ulcer symptoms: painful sores, irritation with food, local tenderness
• Skin ulcer symptoms: open wound, drainage, swelling, discoloration, delayed healing

Causes and risk factors

For peptic ulcers, two leading causes are infection with Helicobacter pylori and regular use of nonsteroidal anti-inflammatory drugs, often called NSAIDs. These medicines include common pain relievers such as ibuprofen, naproxen, and aspirin. H. pylori can weaken the protective lining of the stomach or duodenum, while NSAIDs reduce natural substances that help protect the digestive lining from acid.

Less common causes of peptic ulcers include severe physical stress from critical illness, excess acid production, smoking, heavy alcohol use, and certain medications such as steroids when combined with NSAIDs. Spicy foods and everyday stress do not usually cause ulcers by themselves, although they may make symptoms feel worse.

Skin ulcers are often related to poor blood flow, diabetes, pressure from staying in one position, nerve damage, or vein disease. Some people with slow-healing lower leg wounds may have circulation problems that need specialist care. These concerns may overlap with conditions such as peripheral artery disease or complications of diabetes. Mouth ulcers can be linked to minor trauma, stress, nutritional deficiencies, immune conditions, or, less commonly, infection.

How ulcers are diagnosed

Diagnosis begins with a careful medical history and physical examination. A doctor will ask about the location of symptoms, the timing of pain, recent medicine use, smoking, alcohol, and any signs of bleeding or weight loss. For skin ulcers, the clinician will also examine the wound, nearby skin, pulses, sensation, and signs of infection.

If a peptic ulcer is suspected, testing for H. pylori is often recommended. This may be done using a breath test, stool test, or tissue sample obtained during endoscopy. Blood tests are less useful for diagnosing a current infection because they may stay positive after a past infection.

An upper endoscopy is one of the most useful tests for stomach or duodenal ulcers. During this procedure, a thin flexible camera is passed through the mouth to examine the esophagus, stomach, and duodenum. It can confirm an ulcer, check for bleeding, and allow biopsy if needed. Evaluation may involve endoscopy and, in some cases, colonoscopy if bleeding or another digestive source is being investigated. For skin ulcers, tests may include blood work, wound cultures when infection is suspected, and circulation studies such as Doppler ultrasound.

Treatment options for different types of ulcer

Treatment depends on the type of ulcer and the underlying cause. Peptic ulcers are often treated with medicines that reduce stomach acid, which gives the lining a chance to heal. If H. pylori is present, treatment usually includes a combination of antibiotics and acid suppression. It is important to complete the full course exactly as prescribed and to confirm eradication when the doctor recommends follow-up testing.

If an NSAID caused or worsened the ulcer, stopping or reducing that medicine may be advised. Some people need an alternative pain management plan. When ulcers bleed, endoscopic treatment may help stop the bleeding, and severe cases may require hospital care. In selected situations, especially if symptoms are complex or another digestive disorder is suspected, a doctor may also evaluate for gastritis.

Skin ulcers are treated by relieving pressure, improving circulation when possible, controlling blood sugar, cleaning the wound appropriately, and managing infection if present. Dressings, compression therapy for some venous ulcers, and specialist wound care may be part of treatment. Mouth ulcers often improve on their own, but persistent, frequent, or unusually severe sores should be assessed so the cause can be addressed.

Prevention and self-care

Many ulcers can be prevented or managed more effectively with practical daily steps. For peptic ulcers, medicines should be taken only as directed, especially NSAIDs. A person who needs these pain relievers regularly should ask a doctor whether stomach protection is necessary. Smoking cessation and limiting alcohol can also support healing and reduce irritation.

Eating patterns may not cause peptic ulcers, but some foods can worsen discomfort. It can help to notice which meals trigger symptoms and avoid them. Regular meals, adequate hydration, and not lying down immediately after eating may also improve digestive comfort. Good hand hygiene and food safety may reduce exposure to infections that affect the digestive tract, although H. pylori transmission is not always fully preventable.

For skin ulcers, prevention centers on skin protection and circulation. This may include changing position often, wearing well-fitting shoes, checking the feet daily in diabetes, and treating swelling or vein problems. Keeping chronic conditions well controlled can lower the risk of future wounds. If needed, a structured wound-care plan may involve evaluation by specialists in vascular health, gastroenterology, dermatology, or surgery.

When to seek medical care

Medical review is sensible if upper abdominal pain keeps coming back, if indigestion is persistent, or if a sore in the mouth or on the skin does not improve within a reasonable time. It is also important to seek care for unexplained weight loss, trouble eating, repeated vomiting, or a wound that becomes larger, more painful, or foul-smelling.

Urgent care is needed for symptoms that may suggest bleeding, perforation, or serious infection. These include vomiting blood, black or tarry stools, sudden severe abdominal pain, fainting, fever with a spreading skin wound, or redness and swelling that are rapidly worsening. People with diabetes, poor circulation, or weakened immunity should seek prompt assessment for any non-healing skin ulcer.

For international patients who need coordinated evaluation, Acibadem International’s multidisciplinary specialists and JCI-accredited hospitals diagnose and treat ulcer-related conditions, including digestive ulcers and complex wound problems, using individualized care plans.

Frequently asked questions

What is the difference between an ulcer and a sore?

An ulcer is a type of sore that usually involves a deeper break in the tissue and tends to heal more slowly. The word “sore” is more general and can describe many kinds of irritation or injury. In medicine, an ulcer often suggests an underlying cause that should be identified and treated.

Can stress cause an ulcer?

Stress alone is not considered a common direct cause of peptic ulcers. Most peptic ulcers are linked to H. pylori infection or NSAID use. However, stress can worsen symptoms, affect eating habits, and make digestive discomfort more noticeable.

Do spicy foods cause stomach ulcers?

Spicy foods do not usually cause stomach ulcers. They can, however, irritate an already sensitive stomach and make symptoms such as burning or pain feel worse in some people. Avoiding trigger foods may improve comfort, but it does not replace treatment for the actual cause.

How long does an ulcer take to heal?

Healing time depends on the type of ulcer, its cause, and whether complications are present. Many peptic ulcers improve over several weeks with the right treatment, while skin ulcers may take much longer if circulation is poor or diabetes is not well controlled. A doctor can give a more accurate estimate after diagnosis.

Are ulcers contagious?

The ulcer itself is not contagious. However, H. pylori, one of the common causes of peptic ulcers, can spread between people in some settings. Good hygiene is helpful, but not every ulcer is related to an infection.

When is an ulcer an emergency?

An ulcer may be an emergency if it causes bleeding, perforation, or severe infection. Signs include vomiting blood, black stools, sudden severe abdominal pain, fainting, or a rapidly worsening skin wound with fever. These symptoms should be assessed without delay.

References

• World Health Organization
• National Institute of Diabetes and Digestive and Kidney Diseases
• American College of Gastroenterology
• Mayo Clinic
• National Health Service

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.