You will need Orthodontic treatment. You have what is called a traumatic bite.

U r having deep bite. Consult a dentist. Go for orthodontic treatment.

Ideally you should go for braces that will align your teeth, so that it doesn't cause constant trauma to your gum. If in case you want to avoid that as of now, do get a night guard fabricated for yourself, that can minimize the trauma for the time being However the exact treatment plan will require a clinical checkup first, so visit a nearby dentist soon