Dry nasal passages make it harder for your body to fight the infection. Staying hydrated helps thin the built-up mucus and reduce the feeling of pressure or blockage. Extra fluids can also help soothe a sore throat.  Men should drink at least 13 cups (3.1 L) of fluids per day. Women should drink at least 9 cups (2.1 L) of fluids per day. When you’re fighting off infection, you will need even more. Try to drink at least 8 fluid ounces (240 mL) of water every 2 hours. Water is the best option, but non-caffeinated tea and clear broths are also good options. If you’ve been vomiting, sports drinks containing electrolytes may be necessary to replenish your electrolyte balance. Avoid alcohol. It will actually increase the swelling in your sinuses. Alcohol and caffeine also dehydrate you, so avoid them while you’re sick. European elder is an herb commonly used to treat respiratory illnesses. It has anti-inflammatory and antiviral properties. It also helps boost your immune system. You can find elderberry extract as a syrup, lozenge, or supplemental capsule at most drug stores and nutrition stores.  Alternatively, you can steep 3–5 grams (0.11–0.18 oz) of dried elder flower in a cup of boiling water for 10-15 minutes. Strain the flowers after they have steeped. Drink this tea up to 3 times per day. Do not use unripe or uncooked elderberries, as they may be toxic. If you are pregnant or breastfeeding, do not take elderberries or elderberry extract. If you have an autoimmune disease, such as rheumatoid arthritis or lupus, consult with your doctor before taking elderberries or elderberry extract. Elderberry may interact with diabetic medication, laxatives, chemotherapy drugs, or immunosuppressants. If you take any of these medications, consult your doctor before taking elderberry. Pineapples are rich in an enzyme called bromelain, which is used in medicines for reducing swelling and inflammation of the nose and sinuses.  You can get bromelain by eating 2 slices of fresh pineapple or drinking pineapple juice daily. If you...

TL;DR in Vietnamese:
Uống nhiều chất lỏng. Dùng chiết xuất quả cây cơm cháy. Ăn dứa tươi. Nghỉ ngơi đầy đủ. Kiểm soát stress.