Do I have mandibular prognathism? A misshaped chin? (photo)

You do have an overlying projecting chin even for a male. If you have an underbite then you should consider lower jaw setback surgery which would improve both issues. If only interested is dealing with the protruding chin then a reduction genioplasty by intraoral osteotomy of the chin can be done. You need a multidimensional horizontal setback and height reduction of your chin. This will likely take the 'pressure' off of your smile which you have now as the projecting chin acts as a soft tissue stop as you smile. 

You do have mandibular prognathism. The good news is that while it’s slightly more projecting than the norm it is a highly and strong masculine appearance. Far better than having a weak chin that looks mean and lacking confidence.Part of the prognathism May stem from your maxilla not projecting quite enough but I think much of it has to do with the shape of your mandible. A dental occlusion analysis could help determine what is what but in the end the treatment is probably going to be a reduction of your mandible if you wish to have Interventional.You’re a good looking young man and I would first and foremost reassure you that with your strong masculine features you’re in a good place and you should consider excepting your luck, be proud of it and move on with life. If that doesn’t work for you then look into having surgical correction.Everyone is asymmetrical. I mean every single human being has an asymmetrical face. Don’t worry about the asymmetry. Deal with the mandible only if it really bothers you enough to have surgery.You have a lifetime to think about it.If you had to choose of Amanda bowl that’s too big versus two small as a young man I think I would much rather have what youIf you had to choose of a mandible that’s too big versus too small as a young man I think I would much rather have what you have.Smile naturally, don’t look in the mirror, work out, stay healthy, Enjoy life and look for ethical experienced plastic surgeons who have backgrounds in craniofacial surgery. Sometimes academic medical centers or a better place to find plastic surgeons who do this type of work.Best, Mats Hagstrom MD