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1. Choose the Right Derma Roller: - Select a derma roller with needle lengths between 0.5mm and 1.5mm for the scalp. Shorter needles are less invasive, while longer needles may provide more significant results but also carry more risk.

2. Clean Your Scalp: - Wash your hair and scalp thoroughly with a gentle shampoo to remove any dirt, oil, or product build-up.

3. Disinfect the Derma Roller: - Soak the derma roller in isopropyl alcohol for about 10 minutes to ensure it is properly sanitised.

4. Section Your Hair: - Divide your hair into sections to ensure you cover the entire scalp evenly.

5. Start Rolling: - Gently roll the derma roller over your scalp, applying minimal pressure. Roll in multiple directions: vertically, horizontally, and diagonally. Aim for 10-12 passes in each direction per section. - Focus on areas where hair thinning or hair loss is more prominent.

6. Aftercare: - Apply a soothing serum or oil, such as aloe vera or a specialised hair growth serum, to the treated areas. - Avoid washing your hair for at least 24 hours after treatment to allow the scalp to heal.

7. Frequency: - Use the derma roller once a week or as recommended by a healthcare professional. Overuse can lead to irritation and damage.

Risks and Considerations

1. Infection: - If the derma roller is not properly sterilised or if the scalp is not clean, there is a risk of infection. Always ensure both the device and your scalp are clean before use.

2. Irritation and Redness: - Microneedling can cause temporary redness, irritation, and swelling. This is generally mild and should subside within a few days.

3. Bleeding: - Minor bleeding can occur, especially if using longer needles. This should stop quickly, but if it persists, consult a healthcare professional.

4. Scarring: - Incorrect use or excessive pressure can lead to scarring. Follow the guidelines carefully and avoid overuse.

5. Allergic Reactions: - Be cautious when applying products post-treatment. Some serums or oils may cause allergic reactions on the freshly treated scalp.

6. Pain: - Some discomfort is normal, but if you experience significant pain, you may be applying too much pressure or using needles that are too long.

7. Not Suitable for Everyone: - People with certain skin conditions, such as eczema, psoriasis, or severe acne, should avoid derma rolling. Consult a healthcare professional if you have any concerns.