A head-cooling cap for controlling swelling caused by any head injury is provided. The head-cooling cap includes a flexible, preferably adjustable cap-shaped main body with a plurality of inner cavities containing a cooling substance. The main body can be built in a three-dimensional cap shape or, alternatively, be deformable to adopt a three-dimensional cap shape. When the head-cooling cap is placed on a user's head, the cooling substance, which has been kept at an adequate cold temperature, will cool the head and control any swelling caused by a traumatic head injury. When not placed on a user's head, the head-cooling cap can be conveniently stored in a refrigerator or freezer to prepare it for further use.
