I am a female in my early 20s. This morning I notice there is a white bump (surrounded by many red lines) on my eyeball next to my iris. It feels painful when i blink. But there is no discharge and no itchiness. My eyesight is alright. I am a contact lens user but I did not wear them frequently except going to classes in university. Is it something really serious?? I am not sure what is going on with my eye. Thanks!