Is the baby acting uncomfortable? What do you mean by "not on the lead"? My guess (and it is just a guess) is if he is not in pain, you could safely wait until tomorrow to take him in. But I wouldn't wait longer than that.
my 7 month old daughter has a glassy bump on her eye ball but red is surrounding it.. it doesnt seem to bother her but she has had matter in her eyes the last few days..and eyes have been watery. im going to make a doctors appointment with my pediatrician tomorrow..