I have a very weak, recessed chin and was wondering what caused it and what my options are to fix it? (Photo)

A weak chin can be result of many factors, including genetics. Treatment for a weak chin may involve chin augmentation with silicone implant or bone advancement surgery (ex. genioplasty). Chin surgery can be performed alone or combined with neck liposuction as appropriate for an enhanced appearance. Read more in link below.potomacplasticsurgery.com/blog/category/chin-augmentation/Best, Dr. Chaboki

When patients have a weak and recessive chin profile, the mandible bone is underdeveloped in the projection of it.  If  your teeth are significantly  out of alignment, then consider a sliding genioplasty.  A chin implant iss performed  only for cosmetic purposes. For many examples of chin implants, please see the link and the video below

As best I can tell from your photos you have a very underdeveloped mentum ( chin ). Most likely it can be easily corrected with a properly chosen chin implant. There are all styles, shapes, and sizes available to choose the right one for your needs. I do chin implants in my certified office operating room with simple oral sedation and local anesthesia. Most procedures take about thirty minutes. Recovery is simple and in a week you will look fantastic. If you have bite issues and misalignment of your jaw then this is a separate issue and a bigger problem but can also be corrected. I suggest you see a surgeon with lots of chin work experience and get a good first hand evaluation. Simple neck liposuction can be done at the same time to get you a maximum and fantastic result.