Fever patch is not harmful to the body, the main drug component of the fever patch is non-steroidal anti-inflammatory drugs, through the absorption of the skin or mucous membrane into the blood to play the role of antipyretic, anti-inflammatory, pain relief, reducing the stimulating effect of oral drugs on the liver and kidneys, resulting in liver or kidney damage, but also reduce the damage of oral drugs on the digestive system, such as patients can appear nausea, vomiting, abdominal pain, diarrhea and other gastrointestinal tract symptoms. It also reduces the adverse effects of drug allergies, such as itching of the skin and drug rashes, so the fever patch is not harmful to the body.