Hi there. This will need a checkup and treatment. Although the pain is mild . It is a sign that the dental issue is here to stay. Try to avoid taking painkiller.

Its difficult to give a diagnosis from the info provided as no image is attached. In case there are no other factors the ache might be due to transient factors (stress, bite trauma, extra oral trauma, temperature etc) and the condition is self correcting. However you need to visit your nearest dentist to have a definite diagnosis

Get xray of tooth. Based on clinical pictures, medication can be prescribed. You can consult through this for prescription of medication and instructions on investigations and treatment plan.

Get dentist check up done . Take mild painkiller for comfort . Sharing the  intra oral pictures  will help us to guide you properly.

Hello do gargle with lukewarm water with salt.and for further treatment consult through this

Usually frontal tooth ache starts with any past injury or fall few years ago or even in childhood, If the case is so get a X ray done by dentist nearby and start medicines. If pain is not subsided in 3 days you may need a RCT or Extraction of tooth. Read this ultimate dental guide to understand it better... https://www.ar32.in/AR32-Signature-Smiles/AR32-Dental-treatments-guide.html