Bloating

bloatedgasabdominal bloatingabdominal fullnessbloatgastric fullness
Abdominal bloating is a symptom that can appear at any age, generally associated with functional gastrointestinal disorders or organic diseases, but can also appear alone.wikipedia
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Abdominal distension

abdominal distentiondistensiondistended abdomen
Although this term is usually used interchangeably with abdominal distension, these symptoms probably have different pathophysiological processes, which are not fully understood.
People suffering from this condition often describe it as "feeling bloated".

Lactose intolerance

lactose intolerantlactose-intolerantlactase deficiency
Lactose intolerance, fructose intolerance and other food intolerances
Symptoms may include abdominal pain, bloating, diarrhea, gas, and nausea.

Gastric distension

distendeddistension
Gastric distension
Gastric distension is bloating of the stomach when air is pumped into it. This may be done when someone is performing cardiopulmonary resuscitation and blowing air into the mouth of someone who is not breathing spontaneously.

Fructose malabsorption

fructose intolerancefructoseDietary fructose intolerance
Lactose intolerance, fructose intolerance and other food intolerances
Fructose malabsorption may cause gastrointestinal symptoms such as abdominal pain, bloating, flatulence or diarrhea.

Bowel obstruction

intestinal obstructionobstructionsmall bowel obstruction
Partial bowel obstruction
Signs and symptoms include abdominal pain, vomiting, bloating and not passing gas.

Non-celiac gluten sensitivity

gluten sensitivitynon-coeliac gluten sensitivitygluten sensitive
Non-celiac gluten sensitivity
Gastrointestinal symptoms may include any of the following: abdominal pain, bloating, bowel habit abnormalities (either diarrhea or constipation), nausea, aerophagia, gastroesophageal reflux disease, and aphthous stomatitis.

Aerophagia

aerophagyswallowing airSwallowing of air
Aerophagia (air swallowing, a nervous habit)
Bloating

Ovarian cancer

ovarianovaryovarian carcinoma
Ovarian cancer Large intra-abdominal tumors, such as those arising from cancers of the ovarian, liver, uterus and stomach
The most typical symptoms of ovarian cancer include bloating, abdominal or pelvic pain or discomfort, back pain, irregular menstruation or postmenopausal vaginal bleeding, pain or bleeding after or during sexual intercourse, loss of appetite, fatigue, diarrhea, indigestion, heartburn, constipation, nausea, feeling full, and possibly urinary symptoms (including frequent urination and urgent urination).

Alvarez' syndrome

Alvarez' syndrome, bloating of unknown or psychogenic origin without excess of gas in the digestive tract
Alvarez' syndrome is a medical disorder in which the abdomen becomes bloated without any obvious reason, such as intestinal gas.

Ovarian cyst

ovarian cystscystcystic ovaries
Polycystic ovary syndrome and ovarian cysts
Fullness, heaviness, pressure, swelling, or bloating in the abdomen.

Megacolon

enlarged colon
Megacolon, an abnormal dilation of the colon caused by some diseases, such as Chagas disease, a parasitic infection
External signs and symptoms are constipation of very long duration, abdominal bloating, abdominal tenderness and tympany, abdominal pain, palpation of hard fecal masses and, in toxic megacolon, fever, low blood potassium, tachycardia and may lead to shock.

Dumping syndrome

gastric dumping syndrome
Gastric dumping syndrome or rapid gastric emptying
feeling uncomfortably full or bloated after a meal

Stomach cancer

gastric cancerstomachgastric carcinoma
Large intra-abdominal tumors, such as those arising from cancers of the ovarian, liver, uterus and stomach
Gastric cancers that have enlarged and invaded normal tissue can cause weakness, fatigue, bloating of the stomach after meals, abdominal pain in the upper abdomen, nausea and occasional vomiting, diarrhea or constipation.

Simeticone

simethiconePhazyme
Another treatment is Simethicone, an oral anti-foaming agent that helps the body to expel the gas more quickly.
Simeticone (INN), also known as simethicone (USAN), is an anti-foaming agent used to reduce bloating, discomfort or pain caused by excessive gas.

Prokinetic agent

gastroprokinetic agentprokineticsgastrokinetic
Also combinations of prokinetics, such as domperidone + metoclopramide + diphenhydramine (the latter for the prevention of extrapyramidal reactions, especially acute dystonic reactions) + proton pump inhibitors (PPIs), have dramatic effects on bloaters and belchers especially.
They are used to treat certain gastrointestinal symptoms, including abdominal discomfort, bloating, constipation, heart burn, nausea, and vomiting ; and certain gastrointestinal disorders, including irritable bowel syndrome, gastritis, gastroparesis, and functional dyspepsia.

Prebiotic (nutrition)

prebioticprebioticspre
Soluble fiber is prebiotic and readily fermented in the colon into gases, while insoluble fiber is metabolically inert and absorbs water as it moves through the digestive system, aiding in defecation.
The immediate addition of substantial quantities of prebiotics to the diet may result in an increase in fermentation, leading to increased gas production, bloating or bowel movement.

Indigestion

dyspepsiafunctional dyspepsiadyspeptic
Symptoms may include upper abdominal fullness, heartburn, nausea, belching, or upper abdominal pain.

Small intestinal bacterial overgrowth

bacterial overgrowthsmall bowel bacterial overgrowth syndromesmall intestine bacterial overgrowth
Patients with bacterial overgrowth typically develop symptoms including nausea, bloating, vomiting, diarrhea, malnutrition, weight loss and malabsorption, which is caused by a number of mechanisms.

Toxic megacolon

megacolon, toxic
It is characterized by a very dilated colon (megacolon), accompanied by abdominal distension (bloating), and sometimes fever, abdominal pain, or shock.

Helicobacter pylori

H. pyloriC. pyloriHelicobacter pylori'' infection
Where this develops into chronic gastritis, the symptoms, if present, are often those of nonulcer dyspepsia: stomach pains, nausea, bloating, belching, and sometimes vomiting or black stool.

Volvulus

strangulationtwisted intestinemidgut volvulus
Symptoms include abdominal pain, abdominal bloating, vomiting, constipation, and bloody stool.

Trimegestone

Side effects of trimegestone include headache, breast tenderness, nervousness, abdominal pain, bloating, muscle cramps, nausea, depression, and vaginal bleeding among others.

Malabsorption

malabsorption syndromeintestinal malabsorptionmalabsorption of nutrients
Diarrhea, weight loss, flatulence, abdominal bloating, abdominal cramps, and pain may be present.

Fecal impaction

faecal impactionimpactionstool impaction
Abdominal pain and bloating could also be present depending on the severity of the condition.

Allergy

allergiesallergicallergic reaction
Symptoms of food allergy include abdominal pain, bloating, vomiting, diarrhea, itchy skin, and swelling of the skin during hives.