I am male, 38 years old, I have a lump
You should consult a General Surgeon
As per your description,it looks like a Haemorrhoid.There are two types.One is External haemorrhoid and the other is Internal.
If you are suspicious of Cancer,it can be excluded by histopathological examination (Biopsy) only.
So, please consult your General Surgeon,get examined clinically and proceed further.
Get it removed even it is a haemorrhoid.
Take high fiber diet.Avoid spicy food, Alcohol,Non Vegetarian diet.
Drink plenty of liquids.
Nothing to worry
Hope I answered your query.If you have any questions,I will clarify further.
Wish you good health