Insect bite induces allergic reaction in the body. Allergies occur when your immune system reacts to a foreign body. Foreign body may medicine like pollen, animal dander, dust and insect venom etc. When you have allergies, your immune system makes antibodies that identify a particular allergen as harmful, even though it isn t. Severity of allergy ranges from rash to life-threatening anaphylaxis. Advice 1. Levocetirizine5 mg – 1 tablet once daily for 7 days 2. Dexamethasone 0.5 mg – 1 tablet twice daily for 7 days 3. Do not scratch too much as it will caused skin damage and infection 4. Calamine lotion – three times daily locally 5. Use insect repellent such Odomos cream Thanks