If its a little tiny blister on the tip of your tongue it could be a clogged taste gland and in that case you just wait it out. If its from trauma you can do warm salt water rinses and use something...
A good explanation of this can be found on http://www.webmd.com/oral-health/burning-mouth-syndromeThis is also commonly known by the following names: Burning Tongue Syndrome Glossodynia Glossopyrosis...
If you ever got a pimple on the tip of your tongue I would ask your docter and if you can't see him try looking it up on some medical sites! You might have a rash or infection! Possibly you might be...
No it is not normal for the tip of the tongue or any part of the tongue to hurt. If it does hurt you should see your doctor or dentist right away. Most doctors will fit you into their appointment...