The hair loss is believed to be caused by loosening of the hair shaft from the follicle ... life-threatening allergic reactions from sensitization to glues, rubbers, or other chemicals used ...

Using mehendi frequently for hair coloring can lead to excessive dryness, hair thinning, allergic reactions, and difficulty switching to synthetic dye ...

The difference between this and an allergic reaction was exemplified in patients who had both irritant and allergic reactions at the same time (see Fig 3). Additionally, patients that had ...