Itchy Skin or Scalp
This is one of the most common symptoms of a hair dye allergy. You may experience intense itching, often accompanied by a burning sensation, on the skin where the dye was applied.
Redness and Swelling
The skin around the area where the dye was applied may become red and swollen. This is due to your body's immune response to the allergen in the dye.
Blisters or Sores on the Scalp and Neck
If you're highly allergic to hair dye, you might develop blisters or sores on your scalp, neck, or even your face. These sores can be painful and, in severe cases, they might ooze pus.
Difficulty Breathing
Some people may have a more severe allergic reaction leading to difficulty in breathing. This symptom should not be ignored as it can become life-threatening.
Wheezing and Coughing
These are signs of a respiratory reaction and could occur if you inhale the fumes from the hair dye, particularly during the application process. It might lead to other respiratory problems like shortness of breath or tightness in the chest.
Fainting or Dizziness
Exposure to hair dye can cause lightheadedness, dizziness or even fainting in some individuals due to reduced oxygen levels from throating swelling or from a severe allergic reaction. Immediate medical attention should be sought if this happens.