Need your advices

Hello everyone, my baby of 10 years old started to grow a bump on her head.. I am financially saving for a vet visit of course, but can someone tell me that gonna be okay? It started really small but keeps on growing..

https://preview.redd.it/jlk6yquw9pje1.png?width=2048&format=png&auto=webp&s=de7279e4486d1150be4c7abd1699dcfab268b804

https://preview.redd.it/ec1uatm5apje1.jpg?width=1536&format=pjpg&auto=webp&s=1a4915aa7f232db49124b263926b72b91e4d90f8