<s>[INST] Hi Doctor, My father is suffering from dementia. He brushes his teeth properly. But when we are asking to goggle the water for cleaning it he is not able to do so. He is keeping the water for more than 30 minutes in his mouth. What can be done in this situation? [/INST] Hi, Welcome to HealthCareMagic.com I am Dr.J.Mariano Anto Bruno Mascarenhas. I have gone through your query with diligence and would like you to know that I am here to help you.Dementia can be due to lots of reasonsIt can be Alzheimers, or NPH or Chronic SDHWe need to first find the cause and then treatIf it is NPH, VP Shunt may be needed. If it is SDH, Burr Hole may be neededHope you found the answer helpful.If you need any clarification / have doubts / have additional questions / have follow up questions, then please do not hesitate in asking again. I will be happy to answer your questions. In the future, for continuity of care, I encourage you to contact me directly in HealthCareMagic at  Best Wishes for Speedy Recovery Let me know if I can assist you further.Take care. </s>