What Are Haemorrhoids?
Haemorrhoidal tissue is a normal part of the anal canal and helps with continence. It becomes a problem when the blood vessels and supporting tissue enlarge, become inflamed or move downwards. Internal haemorrhoids develop inside the anal canal and commonly cause bright-red bleeding or prolapse. External haemorrhoids occur beneath the skin around the anus and may cause swelling, irritation or pain, particularly if a blood clot forms.
Internal haemorrhoids are often described in four grades. Grade I remain inside the anal canal; grade II protrude during a bowel movement but return by themselves; grade III need to be gently pushed back; and grade IV remain prolapsed and cannot be reduced. This grading helps guide treatment, but the choice also depends on the main symptom, examination findings, general health and whether another condition may be responsible.
Common contributors include repeated straining, constipation, pregnancy and spending a long time sitting on the toilet. Diarrhoea, heavy lifting and increasing age can also contribute in some people. Haemorrhoids are common and are not a sign of poor hygiene, but recurring symptoms usually improve only when bowel habits and stool consistency are addressed as well as the haemorrhoid itself.

