When a person is looking for a way to communicate in alternative ways, they need to find something that really works for them. They need to try to find a voice that sounds natural. They want to try to find a way to be efficient. They want to be able to communicate as normally as possible, even though they're not using their biological voice.
There are so many different causes for potential pain that it can be hard to find the cause. If you have CP or are a parent of someone with CP it is really important to empower yourself with information on pain including what causes it and options for treatment. You need to work out what is causing the pain not just mask it with pain medication.