Harvard Health Content API

Located at the back of the upper arm, the triceps muscles constitute about two-thirds of its muscle mass. Often overlooked by people in favor of training the more-visible biceps or deltoid muscles, the triceps are integral to performing everyday tasks, such as heavy lifting and reaching.

Migraine can’t be diagnosed using a blood test, imaging scan, or biopsy. Rather, doctors typically diagnose this headache disorder solely through a person’s reported symptoms (including how often they occur and how long they last), triggers, and a family history of migraine.

Even after using a certain deodorant for years, people can develop allergic contact dermatitis to that product. Individuals who suddenly develop redness, itching, or a rash in their armpits should stop using their deodorant and switch to another product.

Caffeine is likely to help prevent or dull headaches when it’s used consistently and in moderation. For most adults, moderation means the amount in about one to two cups of coffee a day.

A 2026 analysis indicated that among adults ages 50 and older, men were more inclined than women to rely on medical professionals when making health care decisions and less likely to put quality of life ahead of simply living longer.

The bird dog exercise is performed on the hands and knees. It involves extending one arm and the leg on the opposite side simultaneously. This exercise is highly effective at strengthening the core, the group of muscles in the abdomen, back, pelvis, and hips that stabilize the spine.

Every person smells a little different, due to genetics, hygiene habits, and the skin’s microbiome (the microbes that naturally live on the skin), but body odor occurs when someone’s scent becomes foul. It is most noticeable when people are sweating, but body odor changes sometimes signal certain health conditions.