Bisul masa pregnant memang biasa terjadi sebab kulit stretched dan hormone berubah, tapi sebab sakit bila tersentuh, better check with your doctor atau midwife just to be safe ya, a few of my mum friends had similar bumps during pregnancy and some kena infected if kena garuk-garuk. Don't squeeze or produk-produk sendiri, just keep it clean and loose clothing, tapi honestly the safest move is tanya your gynae kalau apa-apa as preggers skin can be unpredictable, better err on the side of caution