Change in skin tone next to hairline

The changes to pigmentation along your hairline could be from many factors. You may want to request testing to be performed by your dermatologist for proper diagnosis. In the meantime you want to protect the area from sun by wearing sunscreen every day.

I'm sorry to hear about your concerns with the change in skin tone near your hairline. It can be frustrating when you don't receive clear answers. Here are some considerations and steps you might take:

Possible Causes
Pigmentation Changes: Variations in skin tone can be due to hyperpigmentation or hypopigmentation, which might result from sun exposure, hormonal changes, or irritation.

Vitiligo: This condition causes loss of skin pigment and could lead to lighter patches of skin.

Seborrheic Dermatitis: This is a common skin condition that can cause redness and lighter patches, especially near the hairline.

Fungal Infections: These can sometimes cause changes in skin color and texture.

Next Steps
Seek a Specialist: Consider consulting a dermatologist who specializes in pigmentary disorders. They may have more insight into subtle changes in skin tone.

Skin Biopsy: If the cause remains unclear, a biopsy might be necessary to provide more information about the underlying condition.

Photographic Monitoring: Take regular photos to monitor any changes over time, which can be helpful during consultations.

Consider a Patch Test: If irritation or an allergic reaction is suspected, a patch test might identify any contributing factors.

General Advice
Sun Protection: Always use sunscreen to protect your skin, as sun exposure can exacerbate pigmentation issues.
Gentle Skincare: Use mild, non-irritating skincare products to avoid further irritation.
I hope this information helps guide your next steps. It's important to continue seeking answers if you're concerned about changes in your skin.