Side-effects of medication: <\/strong>Medicines like non-steroidal anti-inflammatory drugs (NSAIDs), psychotropic drugs, or tetracyclines can lead to increased melanin production, which causes dark spots.\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\nThese spots are usually harmless, but finding out the cause is essential as sometimes it may be due to an underlying medical condition, which needs to diagnosed and managed appropriately by a doctor.\u00a0<\/p>\n\n\n\n