Patch Testing Explained

It is legal requirement for all therapists to carry out patch tests prior to tinting treatments to check for possible allergies in clients, it is rare that someone is allergic to the henna, but it does happen.

Even though a client may have already had a henna treatment before, either at your salon or elsewhere, and has never had an allergic reaction to the henna, body chemistry can change.

  • Pregnancy
  • Illness/recent operation/medication
  • Change of season
  • Hypersensitive
  • Client may have built up an allergy over time
  • Hormones

The procedure for carrying out a patch test on a client

  • It must be carried out at least 24-48 hours before treatment
  • Mix small amount of henna and water
  • Apply behind ear or crook of arm, leave on for 10 mins and remove
  • Positive reaction will feel tingly, irritated and appear red
  • Negative reaction – no change to skin
  • (please note a client should be re-patch tested if the treatment hasn’t been carried out in 3 months, due to environmental, skin changes, medical changes etc)

Examples of reactions below: