If it's severely damaged..better to remove.. for detailed information do direct online consultation with photos

A broken or detached toenail is a common and often painful condition that many people experience. A injured, the toenail will often appear black or purple as blood collects under the nail, which is called subungual hematoma. The blood puts pressure on the nail, which may fall off after several weeks. Depending on which toe is affected, and how much of the nail is damaged, it can take up to 18 months for a toenail to grow back completely. It is important to wear well-fitting shoes and socks and keep the nail well-trimmed to prevent further injury. Preferably go for a complete nail avulsion. Consult ur Dermatologist for the same.