You’ve got a deep cut and you really don’t know if you can manage it or it requires stitches well this article can help with
Consider the depth of the wound.
If it is greater than 1/4 inch deep, the wound may be eligible for stitching. If it’s deep enough that you can see yellow fatty tissue, or even bone, you should definitely see a doctor for treatment.
Evaluate the width of the wound.
Are the edges of the wound close together, or do they need to be pulled together to cover the exposed tissue? If the edges of the wound need to be pulled together to cover a gap of exposed tissue, this is an indication that stitches may be required. By pulling the edges of the wound close enough to where they can touch, stitches can help to speed healing.
Look at the location of the wound.
If the open wound is located on a specific area of the body where there is a lot of movement involved, it will most likely need stitching to prevent re-opening of the wound caused by movement and stretching of the skin. For example, an open wound on the knee joint or fingers (especially where joints connect) would be eligible for stitches whereas an open wound on the thigh would not really need stitching.
Ask your doctor about getting a tetanus shot.
Tetanus shots last no longer than 10 years and then you’ll have to be re-vaccinated. If you have an open wound and it’s been longer than 10 years since you’ve had a tetanus shot, go to the hospital.
While you are at the hospital, you can have the doctor evaluate the cut also to see if it will need stitching.