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What are the causes of throat pain, cough, joint pain and night sweating?

Common cold
Influenza
Tonsillitis
Sinusitis
Upper respiratory airways infection
Hyperthyroidism
Rheumatoid arthritis
Nephrotic syndrome

What are the required investigation?

Clinical examination by a specialist
Blood test
Chest x-ray

What is the treatment?

physical comfort
mental comfort and avoid tension, thinking and anxiety
Drink lots of hot liquid Kalinson, chamomile, marinated and other herbs
Rinse with water and salt
Use aerosols that help relieve sore throat
Use throat-shaped moisturizers like strepsels
Use of antihistamines to relieve sore throat
Use medications that contain painkillers such as paracetamol
Proper nutrition and eating foods rich in vitamin C that helps strengthen the body's immunity
use antibiotic as ogmuin or erythromycin or amoxicillin
Feel free to message me anytime if you have any other questions.
Warm Regard
khaled jaber