1. Eat more - you need fuel to rebuild the tissue you break down
2. Keep your sets between 8-12 for max hypertrophy (but variety from time to time is good too just to throw your body off)
3. To bulk, at least 1 gram of protein per lb of LEAN body weight. Some say to go as high as 1.25 grams per
4. More rest. Can heal if you don't rest. More sleep as well as more days off between hitting the same body part again.
Those are the basics. Now we just need to see your workout routine and eating routine so we can slice and dice that too.