Hi, I'm actually doing this for my friend but he really needs help. He is 25 years old, 6' 1", around 200 pounds.He's been feeling sick for about two months now. He feels flush all the time and nauseous, tired and weak and has a lot of pressure in his head sometimes which might just be from fall allergies or something. He's gone to the doctors and had some blood tests but they haven't found anything. He's making an appointment to get an MRI to see if there's something in his brain but is there anything else he should look for?