Nasal congestion due to allergies is a condition when the body reacts to allergens (allergens). Many consider this condition to be a common cold symptom caused by a virus. As a result, the condition of nasal congestion due to allergies is not handled properly. Colds are often caused by a viral infection that attacks the upper respiratory tract. When an infection occurs, the immune system will try to fight. This response then causes nasal congestion. Whereas in colds due to allergies, blockages in the nose are caused by the immune system that reacts excessively to allergens, such as dust or animal dander. Differentiating Colds due to Viruses and Allergies Nasal congestion due to viruses and allergies have similar symptoms, making it rather difficult to distinguish. However, there are several things you can observe to distinguish these two conditions, namely: When a cold occurs The virus that causes colds will develop faster during the rainy season. Symptoms of a cold or runn