Eight days of sick days in a year isn't enough? Then you are getting sick quite often and maybe seeing a doctor isn't the worst idea ever.
Not really. Adults average 2 - 4 colds per year. Colds generally last 3 - 4 days, although they can last up to a week. If I were to miss work as soon as
my symptoms started showing (so for the full 3 - 4 days, possibly more), then that's conceivably 16 days right there. At my work, you need a doctor's note if you miss more than two consecutive days. And that's without making allowances for any other unforeseen illnesses that might hit you up (e.g. a few years ago I got a terrible ear infection that I actually did see a doctor for). I had a coworker who thought nothing of taking a sick day here and there, until he got hit with a monster cold late in the year and didn't have enough sick days to take off. So I always save my sick days for when I absolutely need them. I took 1.5 days off for this particular cold, out of the four days I've had symptoms.
Really, although I might catch colds more easily than some other people - although I don't get more than 4 per year, and this is actually my first cold this year, surprisingly* - my coworker is
exaggerating when she says that I'm sick all the time. A lot of it is confirmation bias. The thing is, many people are fortunate enough to be infected with the cold virus, but not show any symptoms, so they can go to work with no one the wiser. I am not one of those people. I show symptoms every single time (I think). So strictly speaking it's not like I'm getting hit with the common cold that much more often than most people... it's just more obvious when I'm sick. So when I say that I catch colds more easily, perhaps it's more accurate to say that I just show the symptoms a lot more.
* I started eating better and exercising more this year, plus I've been getting more sleep. That seems to have made a difference. And no, I don't know why I somehow managed to escape getting sick during flu season only to be hit up in the middle of summer, either.
It could be that your boss or someone else who's up higher than your coworker/supervisor has also noticed your frequent illness and absences and feels that you're slacking or faking.
I actually don't miss work that often for illness, so that's not it. In fact, when I came back to work after calling out sick this week, my boss told me, "When you called in, I thought, wow, you must have been dying."
(And for the record, since a few people have brought it up, I do know that I suffer from allergies too!)