Suffering from cold for more than 15 day

you have an infection and you might need antibiotics. kindly consult a physician for prescription. - Avoid cold food and water, preferably have hot food(less oily) and water - Don't skip meals have a liquid diet containing soups and progressively increase to solid diet as per how you can tolerate. - Have food rich in vitamin C such as oranges to help build immunity. - Drink plenty of fluids, drink 3 liters of water per day - Do salt water gargling with lukewarm water thrice a day - Do steam inhalation (plain steam) thrice a day and apply vaporub over your chest and nose - Maintain good personal hygiene(Wash you hands regularly) - Rest plenty, body heals while at rest If the condition persists or worsens visit nearest ER at earliest