causes of black spots on skin

Black spots on the skin, often referred to as hyperpigmentation, have a variety of causes, and while age spots or sun spots are common, they aren’t the only factors. In your case, given that you’re only 30, there are a few other possible explanations. Sun exposure is indeed a major cause since ultraviolet (UV) light can increase melanin production, leading to these pigment changes. Even if you’ve been diligent with sunscreen recently, past sun exposure may have resulted in these spots now becoming more prominent. Besides UV exposure, hormonal changes, particularly around pregnancy or from contraceptive use, can lead to melasma, which causes patchy pigmentation often on the face. Another possibility is post-inflammatory hyperpigmentation, where skin darkens after an injury like a cut or acne. There’s also a chance that certain medications can cause skin darkening as a side effect.

Regarding concern, most skin pigmentation changes are benign. A dermatologist’s input, as you’ve already sought, is valuable to rule out anything concerning, like malignant melanoma, though it sounds like they didn’t see it as suspicious. Whether they go away depends on the cause; hyperpigmentation from injury may fade with time, whereas age spots might persist. Treatment options vary; topical treatments with ingredients like hydroquinone, vitamin C, or retinoids can help lighten spots. Chemical peels, laser therapy, or microdermabrasion are methods a dermatologist might suggest for more persistent pigment. It’s crucial to continue protecting your skin from the sun with a broad-spectrum sunscreen. Monitoring any changes in existing spots, such as rapid growth, change in color or border, is wise, and consulting with your dermatologist about these can guide further steps.