Brief Answer:
most likely can be hemorrhoid.

Detailed Answer:
Hello,
Thank you for posting query on this forum.
I am a Gastroenterologist and would be answering your query.

My first suggestion is that if possible please attach a good quality clear photograph of the bump.It would help me a lot.

As per the description given by you there are a number of conditions that may fit your descriptions, which range from common (hemorrhoids) to more uncommon and serious (cancer). However, before you let your imagination get away from you, i would advice you to see a doctor who can examine you in person ,the best way to diagnose the issue and prescribe any necessary treatment.

To answer your question,
The bump you’ve found could indeed be a common hemmorhoid,which are swollen veins in the lower rectum and anus . They tend to be followed by pain, swelling, or itching near the area, fecal leakage, and bloody bowel movements. A number of behaviors and conditions are associated with these particular problem including straining to have a bowel movement, constipation or diarrhea, heavy lifting, prolonged sitting, anal intercourse, pregnancy, obesity, and liver disease. Discomfort and swelling may come and go.Hemorrhoids can either form internally (inside the anal canal) or externally with the potential to thrombus (form a clot), causing pain and additional swelling. The good news is that once there are a number of options for treatment and prevention.

Other than hemorrhoids, there are several conditions that can cause similar small bumps to sprout near the anus:

Perianal hematomas are very similar to hemorrhoids and often misdiagnosed as such. They are actually a burst blood vessel near the anus, causing a pool of blood to form underneath the skin. These bumps are usually caused by straining or trauma to the area and can be very painful. If caught within the first 48 hours or before they begin to heal on their own.

Molluscum contagiosum is another type of bump that can occur anywhere on the body including near the anus. Despite being harmless, they can swell up and last between 6 to12 months. Mollusca can very easily spread to other parts of the body through contact. These small bumps have the tendency to heal on their own, but there are some additional treatment options available to remove them sooner.
Anal warts, commonly seen as a single bump or in a cluster resembling a cauliflower, is also another possibility. They are not usually painful, but can spread and multiply. They are caused by the human papillomavirus (HPV) and can be treated by topical medication, surgery, freezing, and laser treatment (all of which are administered by a health care provider).
Anal cancer is uncommon, but can also appear as a small lump in the anal canal. Other symptoms include anal bleeding, itching, or pain. The majority of anal cancers are caused by HPV. Risk factors include older age, smoking, engaging in anal sex. Anal cancer can be treated by chemotherapy, radiation, or several different surgical procedures.
Before you get all bummed out or try to treat symptoms, it’s best to get help identifying the real culprit for your bump.
In person examination should be done initially.

Regard.

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Brief Answer:
Follow up

Detailed Answer:
Hi again,
Most likely its external hemorrhoid.
An in person examination should be done for accurate diagnosis.
However the most probable diagnosis as per your history is Hemorrhoid.

Regards.

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Brief Answer:
Follow up.

Detailed Answer:
Hello again dear,
The only way to diagnose a External hemorrhoid is by examining it.It is usually very easy to identify a hemorrhoid however as you have already been examined the only thing you can do is wait and watch.
However a secondary opinion can be taken by in person examination by a second doctor.
Thanks.

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