It's not uncommon for the area around a piercing to get red or bruised. Give it some time and it will heal as long as there is no kind of drainage coming from the pierced spot. Keep it clean. If it's sensitive to touch you can put ice on it. Just keep an eye out for infection.
i have 6 piercings the best thing i can tell u to use is ebsome salt mixed w warm water and poor it n a lil cup and juss hold it on there 4 about 10 mins a day for a bout a week. i promise itll get better!