What are the symptoms of rheumatoid arthritis and Sjögren's syndrome?

Rheumatoid sicca syndrome, also known as Sjögren's syndrome, presents with diverse and complex symptoms, primarily categorized into two groups: localized and systemic. Localized symptoms include: 1. Xerostomia (dry mouth):表现为口干、牙齿干燥甚至脱落，需大量饮水，固体食物需用水送下。 - Characterized by dry mouth, dryness of the teeth, and even tooth loss. Patients often require large amounts of water and must use water to swallow solid foods. 2. Dry eye syndrome (keratoconjunctivitis sicca):即干燥性角膜炎，患者常感眼干涩、异物感，严重者需使用人工泪液缓解。 - Patients frequently experience dryness, irritation, and a foreign body sensation in the eyes. Severe cases require the use of artificial tears for relief. Systemic symptoms are more extensive and include: 1. Skin and mucous membrane damage, which may manifest as purpura-like or urticaria-like rashes. 2. Kidney involvement: Approximately 30% of patients experience increased nighttime urination, renal calcification, and kidney stones. 3. Respiratory symptoms: Such as dry cough and shortness of breath. 4. Digestive system symptoms: Including loss of appetite and indigestion. 5. Neurological symptoms: May include sensory and motor nerve abnormalities, and even hemiplegia. If any of these suspected symptoms occur, prompt medical attention should be sought.