These symptoms, such as blocked nose, headache, body pain, sneezing, watery eyes, and nausea, are commonly seen with a viral illness like a cold or flu, and sometimes an allergy can also play a role. Rest well, drink warm fluids, and take a steam to help open your nose and feel more comfortable. You can use simple pain relief and cold relief tablets if needed, and avoid dust, cold air, and heavy meals. If symptoms become severe, last more than a few days, or you get a high fever or repeated vomiting, consult your doctor for proper care.