Hello.Anal protusion and anal lump sensation,possible diagnose is external hemorrhoids
(many people coexist internal and external hemorrhoids).
Hemorrhoids is not important pathology.The most common symptoms are anal pain
,anal itching and bleeding.The symptoms appear as the size or the pressure of the hemorrhoid .You must know factors that increase the size or pressure of the hemorrhoid(constipation
,weight gain or abdominal obesity
alcohol excess,spicy foof)to prevent hemorrhoidal crisis.If appear hemorrhoidal crisis although you do preventive activities;there is treatment,initially conservative,that consiste of:diet with plenty of water, fruit(except apple and banana) and vegetables,anal local cold
or anesthetics)laxatives,drugs for vein tone.If hemorrhoidal crisis are very frequent or not improvement with conservative treatment;surgery is indicated.
I wish you good health