Esthetician here. Hyperpigmentation is very, very common after electrolysis but two weeks is way too soon to start worrying about that. Your best bet is to use a gentle astringent like witch hazel on your skin for 24 hours post-treatment, followed by a bland moisturizer like Cerave or even plain petroleum jelly. The MOST important thing you can do, though, is to avoid ALL sun exposure and wear at least SPF 30 sunscreen all day, every day, before even leaving the house. Mine is built into my moisturizer so I never go without. It's also good to wear a broad-brimmed hat and avoid being outdoors during peak sun time. This will most likely prevent/reduce any lingering redness, but if not there are other easy treatments you can try.