<s>[INST] Hello doctor, About six weeks ago, I started to have vision problems, and I had a migraine. So I went to my pediatrician and got an MRI because they thought I had a tumor. I then went to an ophthalmologist, and he said I have pseudotumor cerebrai. I got a spinal tap done, and all the results came back negative. The doctor told me that it might be due to the birth control I use. Kindly advice. [/INST] Hello. Birth control pills with estrogen are an established cause of such a condition. In pseudotumor, all investigations are normal, just like in your case. Hence it is called as "pseudo" tumor. The next important step is to meet with your obstetrician and change the type of birth control pills you are on. Your ophthalmologist or physician may start you on oral medications to reduce the swelling of your optic nerves. The other important measure to reduce the severity of your condition is to get your body mass index (BMI) within the normal range. BMI is a simple but effective tool to monitor how healthy your body is in terms of fat content. I hope this helps you. </s>