Growing awareness about dengue has led to increased sales of mosquito repellents. However, experts warn that repellents can cause allergic reactions and skin irritation due to their high toxic levels. Doctors have seen cases of allergic reactions to repellent creams. Children are especially at risk of toxicity if they ingest repellents accidentally. While repellents containing DEET or synthetic pyrethroids are effective, experts recommend using the minimum concentration needed and applying safely to avoid health issues. Maintaining clean surroundings is a better approach for preventing mosquito-borne diseases than heavy reliance on chemicals.