What could happen if you don't carry out hair and skin test?

If you don't carry out a hair and skin test before a hair treatment, you risk experiencing allergic reactions or skin irritation. These reactions can range from mild redness and itching to severe conditions like burns or hair loss. Additionally, without proper testing, you may not achieve the desired results, leading to dissatisfaction with the treatment outcome. Therefore, it's essential to prioritize these tests for safety and effectiveness.