My dad has symptoms that include a numb mouth and tongue, difficulty in speaking and often slurring. Weight loss and loss of strength in his limbs. He has seen a neurologist and it is not a motor neuron disease, nor is it a tumor. He is really struggling and we desperately need some answers.
Hello, The symptoms seem to be related to a stroke. A stroke can also damage the nerves that carry signals to the face, mouth, tongue, and throat. This may cause your mouth to go numb, Chat Doctor.  It can also cause slurred speech. He should be evaluated as soon as possible at the emergency room. Hope I have answered your question. Let me know if I can assist you further.