Anyone know what causes swollen lymph nodes?

[MiissMuffet]

I get them swollen under my armpit sometimes, usually under my right one but today i have them under both. My armpits feel so swollen and bruised
i have no idea why

 

[MrsRH]

I'd see a doctor, hun
much safer than getting a 'diagnosis' on here

xxx

 

[stephwiggy]

Before u worry too much a simple virus or infection can cause it. But if ur concerned do see ur doc xx

 

[MiissMuffet]

I'd see a doctor, hun
much safer than getting a 'diagnosis' on here

xxx

I'm not looking for a diagnoses, it's midnight here Sat night so I can't go to a doctor till Monday i was just curious to see if anyone had any ideas x