hello,

WHat is the issue in wearing that. it is for your safety. it will better not to remove and give the exam. if you still feel uneasy then ask the invigilator who will be present in the hall or while entering into the hall.

Follow the guidelines as it is your health at your own risk. It is a matter of few  hours. sometimes, it is important to take up pain for few time to make your performance well and keep your health safe.

Hope it helps!