Ear lobe swelling 2 weeks after piercing (Photo)

It's 2 weeks after my piercing my right ear has suddenly swollen and became hard. No pain is there. My ear ring is not tight and I maintained heigen environment. Washed my pillow cover every two days with hot water and dettol. I'll wash the area with warm water and Johnson baby shampoo twice a day during bath. I applied the after care gel for 1 week and then all was perfectly fine so I stopped. What is the reason for this swelling