dark spots on body

Dark spots can have a variety of causes, and working that out depends on some specific characteristcis of the spots themselves. At your age and considering your healthy status, some of the more benign possibilities include hyperpigmentation due to sun exposure, which is quite common. The spots could be lentigines, often referred to as sun or liver spots, but those are more typical with aging and chronic sun exposure. Being consistent with sunscreen might prevent further dark spots if that’s the case, but this wouldn’t directly treat any existing ones. Other potential causes could be post-inflammatory hyperpigmentation, which is darkening of the skin following inflammation or injury, yet you mentioned no recent trauma. Occasionally, systemic conditions like hormonal changes or specific nutrient deficiencies (like vitamin B12) might contribute to skin changes, although significantly less likely without a history of related symptoms. While genetics can play a part in skin characteristics, it doesn’t typically cause sudden spot appearance without other underlying factors. Seeing a doctor sooner is always beneficial if you’re noticing changes in your skin, especially when they’re persistent and spreading. A visit to a dermatologist would be wise to rule out anything more serious like melasma, which in rare cases without proper resistance can evolve. They’ll likely conduct a close examination and, if needed, skin biopsy, to provide a definitive diagnosis. In the meantime, observe any changes in the size, color, or shape of these spots, as rapid changes can sometimes be a red flag. Continue monitoring your skin and maintain sun protection; but get those spots checked out soon so you can know for sure what you’re dealing with.