Fever for 2 days is commonly caused by viral infections, flu, or other temporary illnesses. Dolo 650 can help reduce fever and body pain, but avoid taking more than the recommended dose without medical advice, as excessive paracetamol may affect the liver. Rest well, drink plenty of fluids/ORS, and eat light meals. If the fever continues beyond 3 days, becomes very high, or is associated with symptoms like breathing difficulty, severe headache, rash, vomiting, dehydration, or severe weakness, consult a doctor for proper evaluation and possible blood tests. Avoid starting antibiotics on your own.