black spots on back of body

While you might be feeling a bit stressed about these black spots, it sounds like you’re taking a sensible approach by considering the possibility of seeing a dermatologist. The appearance of these spots, especially since they’ve multiplied, could be due to various reasons. One common possibility could be something benign like dermatofiibromas, which are harmless small growths that can develop on the skin. Another could be lentigines, often caused by sun exposure. However, sun exposure reactions, especially after a long hiking trip, could also have led to some hyperpigmentation. Bug bites typically cause itchiness, but sometimes they can result in persistent discoloration too. However, given the changes you’ve noticed, and considering that these spots don’t fade or change, it is important to have them evaluated to rule out other potential conditions like melanoma, which, although rare, is a serious form of skin cancer. Melanoma can develop as dark spots that increase in size and potentially change over time. Seeing a dermatologist would be a smart next step. They can perform a precise examination and could potentially conduct a biopsy if they deem it necessary, to ensure nothing serious is overlooked. Your friend’s mention of vitamin deficiency is less likely to be the primary cause but can contribute to overall skin health. Overall, booking an appointment for a professional skin examination remains the best course of action.