Your son is experiencing recurring angioedema (swelling). Since it returns every few days, using antihistamines like Cetirizine only when symptoms appear is not enough to control it. He needs a proper evaluation by a pediatrician or allergist to identify the underlying cause, such as chronic hives or an allergen trigger. Please do not start new medications without professional advice. A doctor may prescribe a daily, preventative antihistamine plan rather than treating it reactively. Note: If he ever experiences difficulty breathing, throat tightness, or trouble swallowing, seek emergency medical care immediately.

If fever continues despite Paracetamol, you can take paracetamol every 6 hours and add an antihistamine and steam inhalation for cold relief. If the fever is high or lasts more than 2-3 days, you may need a doctor's checkup to rule out a bacterial infection and start the right treatment.

A cough and cold lasting 15 days is quite common but warrants a professional evaluation to rule out secondary infections or allergies. Please consult a doctor to have your chest examined. For temporary relief, you can use saline nasal sprays for congestion, steam inhalation, and warm water with honey to soothe your throat. If allergies are suspected, an over-the-counter antihistamine like cetirizine may help. Avoid taking antibiotics without a prescription, as they do not cure viral infections. Stay well-hydrated and rest. See a physician promptly if you experience shortness of breath, chest pain, or a high fever.

Frequent coughs and colds are very common and often triggered by mild viral infections or allergies. For relief, you can use safe generic medicines: paracetamol for body aches, cetirizine or loratadine (antihistamines) for a runny nose and sneezing, and dextromethorphan for a dry cough or guaifenesin for a wet cough. Saline nasal sprays are also excellent for clearing congestion. Since these symptoms occur frequently, they may be due to underlying allergies rather than constant infections. I recommend staying well-hydrated and resting. Please consult a healthcare provider for a proper evaluation to identify any specific triggers and get a personalized, long-term care plan.

Your mother is currently taking both Cetirizine and Okacet Cold. Please note that Okacet Cold already contains Cetirizine; taking both together results in double-dosing, which can cause severe drowsiness and dry mouth. She should stop taking them together immediately. For relief from her heavy head and runny nose, she can safely use saline nasal sprays and try steam inhalation. Since she has a persistent cough, she may require a specific cough syrup depending on whether her cough is dry or productive. Please consult a doctor for a proper physical evaluation before adding any new medications.