If the mobility is slight and it is due to gum infection
then doing warm saline rinses and after that massaging the gum with some good gun paint helps. If the gum paint is not available then you can use mustard oil with a pinch of salt to rub that area. This should be done at least twice a day.You should go to dentist
as soon as possible and if you cannot afford a private dentist then you can try some dental school near your home. In dental schools the treatment is cheap or they can do it even free as they also need patients to learn. However the treatment done is absolutely good and uncompromising. You can also try some free dental clinics.