Final answer:
For severe split ends, the best solution is to cut them off. This prevents further damage and the possibility of the split traveling up the hair shaft, which could cause more extensive damage. Ignoring them or not consulting a physician are not recommended unless there is a bigger health concern.
Step-by-step explanation:
In severe cases of split ends, the best action to take is c. cut off the split ends. Split ends occur when the protective outer layer of the hair cuticle wears away due to stress, heat, or mechanical damage, such as brushing and styling. Trimming the hair is a direct solution that removes the damaged tips and prevents the split from traveling up the hair shaft, which can lead to more damage and breakage. While allowing hair to grow out without cutting may seem like a way to retain length, it does not address the problem of split ends and can result in further splitting and damage. Consulting a physician is unnecessary unless there are underlying scalp or hair health issues. It's also not advisable to leave split ends alone, as this can result in more damage to your hair.