Final answer:
Headaches are a common nervous system issue often associated with stress and muscle tension, particularly in the shoulders, neck, and head. Tension headaches, the most prevalent type, can be mitigated through relaxation and mild pain relievers, while migraines may need prescription medication.
Step-by-step explanation:
Headaches, which often result from stress or muscle tension, are a common nervous system condition. There are various types of headaches with different causes and symptoms. A tension headache is characterized by the contracting and tensing of muscles in the shoulders, neck, and head, which may be accompanied by pain or soreness in the temples.
Stress is a significant factor in tension headaches, which can be relieved by relaxation, mild pain relievers like ibuprofen, or addressing the underlying causes such as sleep deprivation, eye strain, and poor posture. Specifically, excessive clenching of the teeth can lead to the contraction of head and neck muscles, resulting in a tension headache. Other types of headaches such as migraines involve blood vessel swelling and may require prescription drugs for relief.