My 4 year old son has been complaining of feeling popping in his brain that his brain feels broken I took him to his pediatrician and a test was done to check the fluid in his ear canal . The pediatrician said he did have some fluid in the left but the right side was unconclusive. I was told to follow up in a month and if the problem persists for me to take him back to the doctor to repeat the test and possibly get a CT scan . Just a minute ago he came running and screaming that his head was popping. He cried and complained for about 5 min and now he is playing with his toys. I ve look at his eyes to make sure they weren t wondering, and he seems fine. What I am needing to know is with this popping in his head (which is always the right side around the parietal region) and his sudden outburst of yelling for no reason, how he can not sit still for 5 minutes, and his attitude changes, could it be a brain tumor? I am going to make a appointment again in the morning with his pediatrician, but I would like to know what you think. Thank you, Yvette