My wisdom tooth is growing & when i stick my tongue to feel it, i feel an open flap that is rather painful. will this resolve itself once the tooth fully grows?

Perhaps: Keep it clean with brushing even if it feels a little sore when you do. Rinsing with salt water (1 teaspoon of salt in a glass of warm water will make it feel better and almost act like an antiseptic. See your dentist to determine if there is enough room in your mouth to erupt fully. If it is going to be a problem, it is better to plan for that rather than waiting until you have an emergency.

Maybe: If you have room for the tooth and it is erupting straight into place, it will probably be ok. Right now, there is an increased chance of an infection starting around the tooth as is stopping only partially in. There is not much you can do about it. If the pain and irritation gets worse you will probably need to have it taken out.

Yes but slowly: Yes, as the tooth erupts the flap will disappear in time. You must keep those teeth very clean to avoid infection.

Possibly: if there is space for the tooth to fit, it may come in on it's own. the flap may be normal, or may need to be removed by a dentist.

See your dentist: In many cases wisdom teeth should be extracted due to complications associated with the presence of tooth decay. It is a common procedure, generally performed under local anesthesia, intravenous (IV) sedation, or general anesthesia by a specially trained dentist or oral surgeon. Often extracting a wisdom tooth is the best solution. See your dentist for x-ray and evaluation.