Allergy is an adverse reaction which is caused due to hypersensitivity of the immune system to a particular allergen (substance causing allergy) which is usually not harmful.

Angina pectoris refers to a pain in the front of the left chest (pectoral region), though it may affect any part of the body between the umbilicus to ears, and from right to left wrist.

Animal bites may result in puncture wounds or tearing of the flesh / skin. There is a high risk of infection, if the wound is not treated properly. Serious wounds may require medical attention.