A 4 1/2 year old child who catches a cold once a week has to treat the disease, regulate his life and strengthen his immunity. 1. Treatment of diseases: four and a half year old children once a week colds are mostly caused by viral and bacterial infections, colds can go to the hospital for blood tests, C-reactive protein and other understanding of the pathogenic bacteria, follow the doctor’s instructions to use antibiotics or antiviral drugs, such as cefixime particles, antiviral oral solution. According to the symptoms of the body corresponding to the treatment, such as cough and sputum with aminoglutethimide oral solution, runny nose with pediatric aminoglutethimide granules treatment, and so on. 2. Regulate life: 4 and a half year old children once a week cold, in the disease is not completely healed before try not to go to the place of high traffic, life should be regular, try to avoid staying up late at night, every day to ensure that the nutrition is balanced, avoid picky eating or dieting, drink more warm water, is conducive to the body’s metabolism. 3. Enhance the immune system: 4 years old child cold once a week may be too poor immunity, usually to let the baby appropriate exercise exercise to enhance immunity, follow the doctor’s instructions to use drugs to enhance immunity, such as thymus peptide. The child repeated cold can go to the hospital to find out the cause, and then targeted to deal with.