I had Botox to treat mild frown lines between my eyes. There was minimal to no discomfort at the time of injection, but today there is some soreness and 2 knots. They almost look like cystic nodular acne.I had Botox injections yesterday for the first time, on my frown lines between my eyes. Today I have 2 knots, one on the outside of each frown line. The knots are mildly sore and very slightly red. Should I be concerned or just wait a few days for them to resolve?