What should i do to help this heal? did dumbell curl, felt sharp pain on the underside of my wrist. was 2 hrs ago pain the same. is it a wrist sprain?

Strain: Hi KristinaM, its likely just a strain and dissipate with time. You may notice some mild discomfort and minor swelling over the next few days. It can take as long as a week to heal. If the pain worsens or swelling becomes dramatic or if you have loss of function, it may be a bit more serious and would require a visit to your doctor. Ice and anti inflammatories can helpful for symptoms.