Aiyoh semut gigitan memang susah nak hilang the dark marks tu! Honestly, dari pengalaman, kena consistent pakai sunscreen dulu sebab kalau exposed to sun je makin hitam lagi. A few of us tried vitamin C serum or niacinamide products (cari kat Watsons or Shopee, banyak options) sebab they help dengan dark spots, and some of my mum friends swear by silicone-based scar creams from pharmacies jugak, kena sabar la, few weeks baru nampak improvement. Tapi if the marks tak hilang after a few months, better check with dermatologist ka sebab they might suggest laser or something stronger, especially kalau already quite dark.