Saline rinses may ease a blocked nose, but safe water matters
England's NHS lists salt-water nasal cleaning as one option for mild sinusitis. Evidence for acute colds remains limited, while unsafe rinse water and hot-water steam can cause harm.
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Night cough guidance puts warning signs before home remedies
England's NHS advises urgent assessment when a cough is severe or rapidly worsening, or comes with chest pain, breathing difficulty or blood. For milder symptoms, fluids and honey may offer limited relief, while sleep-position evidence applies mainly to nighttime reflux.
Most insect bites ease at home, but infection signs need care
Most insect bites and stings cause a small, itchy or painful reaction that improves within days. Breathing difficulty needs emergency help, while spreading pain, heat, pus or fever may signal infection.