Leprosy reaction
When patients begin their medication, the leprosy bacteria are killed quickly, but it can take years for the body to completely get rid of them. During this time the body may react against these dead bacteria, a bit like an allergic reaction; this can make the person feel very ill. Leprosy reaction can also happen before someone starts taking medication, as their natural immune system may already kill off some leprosy bacteria leaving behind dead bacterial cells. During a reaction there is an increased risk of damage to nerves in the eyes, hands and feet, and in some cases the eyes become much more sensitive to sunlight. There are also periods of inflammation, when lumps appear on the face and body. Treating the reaction quickly with anti-inflammatories can help to prevent permanent nerve damage and disability.