This is actually common with Big N full buddy, keep in mind it is a very concentred product,
It’s 600mg /ml which is a lot.
You have to be conscious before taking a high concentration product.
To release the pain, go for Ibuprofen, 400mg 3 times per day with meals.
After every injection, give a good massage on the spot to help to release the product.
Inject preferably before being active, like going to the gym, going outside whatever, it will helps to release it as well. Don’t inject before going to bed or laying down on the couch