Thyroid cysts refer to fluid-filled sac-like structures that appear in the thyroid, which are usually benign. The fluid contained within is often referred to as a blister. These blisters can be quite large, over five centimeters, or quite small, less than one centimeter. They should not be massaged, as massage does not offer any benefits to them. If the cyst is relatively large, massaging the area can stimulate it, causing bleeding within the cyst. Consequently, the cyst may rapidly and temporarily enlarge, potentially causing localized pain, compression, and even difficulties in breathing and swallowing. Therefore, it is advised not to massage thyroid cysts.