About 10 years ago, Charlotte Pennell was pruning bushes in her garden in Winnipeg. One branch seemed especially tough to cut. Then she looked down and saw that she was cutting her finger. She was horrified that she had so little feeling in her hand.

Some forms of chemotherapy can affect or cause damage to your nerve endings, most commonly your sensory nerves. Your sensory nerves tell your brain to feel certain sensations such as touch, heat, cold and pain. When these nerves are damaged, you can have difficulty feeling these sensations correctly. It can lead to tingling, burning or numbness in your hands or feet, usually starting with your toes or fingers and gradually moving toward the centre of your body. It can cause debilitating pain, difficulty feeling hot or cold temperatures and can reduce your motor functioning.