Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain the symptoms of pain in anus while bowel movements along with pressure on sitting and observing a large vein near the edge of anus and inside can be due to Hemorrhoids only that are swollen and inflammed vein in the anal region and occurs commonly due to causes like
chronic constipation or diarrhea, pregnancy and vaginal child birth, obesity,prolonged sitting etc..
I would suggest you to
consult a Proctologist and get evaluated and a thorough clinical evaluation and investigations like Anoscopy can help in diagnosis and treatment can be done accordingly..
You can be advised to apply ointments containing Steroid and anaesthetic ointment like Lignocaine..
Do cool compresses..
You should take a high fibre diet along with plenty of water to ease in bowel movements..
You can also take laxatives and
fibre supplements..
Avoid sitting for long hours..
In case if still there is no resolution you can be advised treatments like
Sclerotherapy, Cryotherapy and surgical treatments like
Rubber Band Ligation..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.