Hair dye allergies occur when the immune system reacts to chemicals in the dye, particularly a common ingredient called PPD (paraphenylenediamine). Other chemicals like ammonia and peroxide can also trigger reactions. Symptoms can appear immediately or after a few hours and include redness, swelling, and rashes on areas like the scalp, face, ears, and neck. You may experience itching, burning, and dry, flaky skin. In some cases, blisters or hives (raised, red bumps) may develop, along with facial or eye swelling. Rarely, a severe allergic reaction called anaphylaxis can occur, which causes breathing difficulties, throat swelling, dizziness, and requires urgent medical treatment.

1. Apis Mellifica: Best for skin allergies with burning and stinging sensations, redness, and hives. It also helps with itching which improves with scratching or in open air.
2. Natrum Mur: Useful for scalp itching, blisters, and soreness, as well as hives with itching and red spots on the body.
3. Urtica Urens: Effective for hives with intense itching and burning sensations. Relief is often felt when lying down.
4. Arsenic Album: Helps with dry crusts or scales on the scalp, burning, itching that worsens in the evening, and other skin dryness issues.
5. Sulphur: Great for scalp eruptions with yellowish crusts, intense itching, and fluid-filled pimples.
6. Graphites: Useful for rough, dry skin, scalp flakiness, and eruptions with a sticky discharge.
7. Merc Sol: Helps with scalp eruptions, sour-smelling sweat, itching, and pain.

Remember, these homeopathic medicines are suitable for mild to moderate hair dye allergies. For severe cases or anaphylaxis, immediate conventional medical help is essential. Always consult with a homeopath for proper diagnosis and treatment.