From the sounds of it, you're most worried about cancer (which I can understand, given your father' s colorectal cancer) so let's address that first.
Dull pain near tailbone -> anal pain - could it be cancer?
Although doctors can very rarely say it's not X or Y with 100% certainty (much less online, without seeing you in person), the answer to your question is that it's less likely, given that:
- You are 20 - anal cancer is usually diagnosed in the 60s
- It's a very rare cancer in itself
- It's common among men who receive anal intercourse, and / or have HPV (human papilloma virus)
In other words, cancer will be pretty low down on a list of people with your story, although a doctor will need to ask you some further questions about you in person.
What's more common in your age group is haemorrhoids, which can be brought on by weight lifting if you are too much, without the correct breathing technique.
They are very common, and can cause a dull aching sensation around the anal area, just as you 've described.
I began to get a brief dull pain near the tailbone occasionally when I got up from a chair and when I rock back while seated. I could not tell if it was muscle related, bone related, or anything deeper. I do not know if the two cases are related but I have not experienced either before.
It's hard for a doctor to tell if these 2 are linked, without examining you. With your history of weight lifting, it's very likely that this could just be a musculoskeletal type injury too, which should recover over time with proper rest.
If this pain is prolonged, do see a doctor (or you can just highlight this issue to the GP, whom I recommend you see anyway to have your anal pain checked out)
What should I do? Is this what I need to wait for it out?
You should see a doctor just to have a look around your anal region. Your GP / polyclinic would be a good place to start.
Let him advise you on what you need next.
He MAY perform proctoscopy just to look at your rectal and anal region. If necessary, he will be the best person to decide if you also require a colonoscopy (which is to look at ALL of your bowels). You can read more about colonscopies in Singapore at this link.
Cheers
