Alum, a group of double sulfate salts (commonly potassium alum), has been traditionally used in various cultures for wound care and minor injuries. Its primary traditional uses include acting as an astringent to stop minor bleeding (as in shaving cuts), reducing swelling, and serving as an antiseptic. Historical records from several regions, including South Asia and the Middle East, reference the topical application of alum for minor cuts, abrasions, and skin injuries. The astringent property of alum helps constrict tissues and blood vessels, thereby reducing bleeding and promoting clot formation.

Scientifically, the evidence supporting alum’s efficacy for treating injuries is limited. Some laboratory studies confirm its astringent and mild antimicrobial properties, but there are few, if any, high-quality clinical trials evaluating alum for wound healing or injury treatment in humans. Most modern medical guidelines do not recommend alum for injury treatment, and its use is based more on traditional practice than robust scientific validation. Furthermore, improper or excessive use can cause skin irritation or delayed healing.

In summary, alum’s use for treating injuries is primarily justified by tradition, with modest supporting evidence for minor hemostatic and antimicrobial effects. However, it should not replace standard wound care methods recommended by healthcare professionals.