Conversation: The conversation between human and AI assistant.
[|Human|] I always feel like there is water or fluid on the side of my head. When I do get it out I can feel a cool feeling on the side of the head. I have trouble in the winter I have to where a cotton ball in that ear because it aches in the winter with the fluid in it. What do do think it is.
[|AI|]  Hi, Thanks for writing in. It is likely that the nerves on your scalp on one side are more sensitive and give you a feeling of fluid collected below the skin. This might be due to irritation of nerves supplying the scalp. Water or fluid inside the brain is a normal feature and everyone has it. That water is much deeply located and will never communicate with the outside surface of brain. Also, the brain is protected by a strong skull and over that there is scalp skin. In this way it is not the water inside your head but some sort of discomfort arising due to nerve stimulation in head and face region. Please consult a doctor and get a neurological clinical examination done. This will help in arriving at a confirmed diagnosis. Doing a CT scan might be indicated depending on clinical findings and to see if there is any structural changes under the scalp causing that feeling. Please do not worry.