Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns. ..
As per your complain and presentation of symptoms a bump over the gums of front tooth that is painful and leading to loosening of tooth are all signs and symptoms of
DENTAL ABSCESS..
In case if it increasing in size also, it can be due to increase in pus formation..
It is possible that the diagnosis is missed in
x Ray and you should consult an Endodontist and get evaluated and in case of Dental Abscess
Root Canal Treatment of tooth followed by antibiotics and painkillers will help..
But in case if there is no
tooth decay then a bubble like bump and loosening of tooth can be due to a
PERIODONTAL ABSCESS which is due to chronic infection in gums leading to deepening of infection and formation of an abscess..
In this case Deep Scaling and curettage followed by antibiotics, painkillers and topical anti-microbial ointment can help..
Hope this information helps..