Are headaches and nausea really severe after forehead filler?

My mother received forehead filler and Botox together a week ago. She was fine until the 3rd day, but she said she started having headaches on the 4th day. After that, the headaches got worse and she felt nauseous like motion sickness. She said she felt sick. Do you feel a pulling sensation? I
 asked the hospital when I visited the hospital yesterday to see the week-long progress, and they said that it varies from person to person, so usually , it can last for about a week to a month. But my mom said it was a bit difficult.
 Is this really what happens after forehead filler? If so, how long does it last? If there is anyone who has had forehead filler, please let me know! ㅜ Currently, the swelling and bruising have improved significantly, and there is no direct pain or heat on the forehead where the filler was applied!