While most patients come with self diagnosis of suffering from piles/haemorrhoids, I reassure them it's normal part of every human being and we are all born with them. Another myth is pain from piles. Piles are painless and cause bleeding, itching and some time jelly like secretions but they very rarely cause pain.

Do we need piles?
Yes. Contrary to belief Haemorrhoids (piles) are necessary for everyone. They have a role in continence (once ability to control/postpone defecation). 

Does Piles cause cancer?

They will never cause cancer or turn into one. 

How much blood is lost because of bleeding from piles?

Most people are concerned about the huge amount of blood they have lost but in most cases it's very little (mls). It looks more as it is mixed with water and water has turned red. It is very rare for one to loose excess amount of blood because of bleeding from piles. This is very rare to cause anaemia (Low blood count) and if found one might need Colonoscopy to rule out other causes of bleeding. 
Bleeding from the piles is bright red in colour and is never mixed with stool. It is self limiting usually lasting few days.

If Piles are normal what causes piles to enlarge?
Causes of enlarged piles/bleeding are associated with increased abdominal pressure. Some of them being
1. Constipation requiring people to put pressure to pass motion.
2. Chronic cough
3. Weight lifting
Other rare causes include soft tissue disorders.

How are piles classified?What are different stages of piles?
Depending on size they are classified into 4 categories. (see the picture) 
1st Degree---mildly enlarged
2nd degree--- big enough to meet opposite side inside anal canal
3rd degree --- come out but go back in on their own/can be pushed back
4th degree--- always outside and stay outside

What is the treatment of piles?

If piles are bleeding intermittently then treating aggravating factor which is constipation in most of the cases will solve the problem.

If persistent bleeding is the problem then haemorrhoids can be dealt with proctoscopy and rubber bands in the clinic for 1st and 2nd degree haemorrhoids.

3rd and 4th degree haemorrhoids need haemorroidectomy. This can be traditional open surgery or no cut stapled haemorroidectomy.
Stapled haemorroidectomy is as good if not better to open haemorroidectomy for treating piles. It's big advantage is considerably less compared to open haemorroidectomy. Both surgery need one day admission.