Bloating in the lower abdomen

The lower abdomen contains much of the large bowel, so stool and gas can produce visible swelling, pressure or cramping. Constipation may cause hard stools, straining or a feeling of incomplete emptying. Irritable bowel syndrome can combine bloating with diarrhoea, constipation or abdominal pain. A food intolerance, lactose intolerance or coeliac disease may also cause repeated symptoms after certain foods. In people who menstruate, hormonal changes around a period can alter bowel movement and fluid sensations.

Bloating is a symptom, not a diagnosis. The timing, bowel pattern and associated symptoms help a clinician decide whether dietary, bowel or pelvic causes need consideration.

Drink regularly, move gently, chew thoroughly and increase fibre gradually if constipation is present. A sudden large fibre increase can temporarily worsen gas. Record foods, periods, stool changes and symptom timing for a few days. Avoid restrictive elimination diets without guidance, and check before using a laxative or other medicine. Nutrition Counselling may help build a balanced plan when food patterns are difficult to interpret.

Seek urgent care for severe or rapidly worsening pain, fainting, fever, repeated vomiting, blood in stool, a rigid abdomen, or swelling with inability to pass stool and gas. Book a medical review for bloating that persists or returns frequently, or for associated weight loss, bleeding, persistent diarrhoea, constipation or a new lump.

Ask which causes fit your bowel pattern, whether a medication could be contributing, and how to manage constipation safely. Explain whether the swelling is constant, whether it follows meals or your menstrual cycle, and whether passing stool or gas changes it.