My daughter is 3 years and seven months old. She is a healthy kid. After two and a half years, we observed that she repeatedly catches a cold and cough. The cold lasts for more than two weeks followed by a cough. Her under eye becomes dark. She breathes with her mouth and keeps her mouth open all the time. She once coughed continuously and we rushed her to the emergency room. She was admitted and a nebulization with oxygen was given. Our family doctor said that it was rhinitis and that due to the persistent cold, she has developed the asthmatic cough. She had wheezing last winter. Currently, we use Asthalin, Budecort inhaler, and Montair LC Kid syrup. Her cold is allergic, but the allergy test was negative. Even a slight climate change affects her. Please suggest a remedy.