Hi... From what you have written I gather your father may have had a stroke in the brain. Generally cerebral stroke is due to bleeding in the brain and patient presents with paralysis and loss of speech Associated conditions like high blood pressure, diabetes and high cholesterol may be present. The nature and severity of the stroke has to be ascertained with CT scan and treatment planned accordingly. Some cases improve with medicines whereas some need surgery. But whatever the case, recovery period for these patients is usually long. Systemic conditions like BP have to be controlled with medicines. Paralysis and speech take a long time to recover and require physiotherapy and speech therapy. So you have to be patient and remain positive. Hope this is helpful