Pain and Fever

1. A ringing, buzzing, or humming sensation in the ears; an early manifestation of salicylate (aspirin) toxicity.
4. A series of sensory disturbances (visual, auditory, or muscular) that may precede a migraine headache.
6. Pyrogens: Fever-producing substances originating outside the body, such as microbes or toxins.
9. Pyrogens: Fever-producing substances produced within the body (e.g., cytokines) in response to infection or inflammation.
10. A paradoxical pain-relieving effect achieved by producing a less severe pain or sensation (such as heat or cold) to counter a more intense one.
11. A substance for external application that produces redness of the skin by causing dilation of the capillaries and increased blood circulation.
13. Liver damage or toxicity, a primary concern with acetaminophen overdose or chronic alcohol consumption.

2. Electrical Nerve Stimulation (TENS): A therapy that uses low-voltage electrical current to provide pain relief for sore muscles or joints.
3. Abnormal sensitivity or intolerance to sound typically paired with light (photophobia), respectively; common symptoms of migraine headaches.
5. Painful menstruation or menstrual cramps.
7. An exceptionally high body temperature (typically >106.0°F orally) that can lead to irreversible neurologic and muscle damage.
8. Pain: Pain described as burning, shooting, or stabbing, often resulting from nerve damage.
12. Syndrome: A rare but serious illness affecting children and teenagers recovering from viral infections who have taken aspirin; characterized by changes in behavior with nausea and vomiting.