Final answer:
Application of heat to the neck and head is contraindicated for migraine headaches, where heat may worsen the pain by further expanding the blood vessels.
Step-by-step explanation:
Contraindications for Heat Application on Headache:
Application of heat to the neck and head can be beneficial for some types of headaches, particularly those associated with muscle tension. However, it is contraindicated for migraine headaches. Migraines are severe headaches caused by the dilation or expansion of the blood vessels in the head and are often accompanied by nausea and disturbed vision. Applying heat during a migraine may exacerbate the headache by further dilating the blood vessels. It is important to differentiate the type of headache before applying heat to ensure the treatment does not worsen symptoms.