What is dyscalculia, the disorder actress Tara Sutaria said she has?

Dyscalculia is a learning disorder that affects a person's ability to understand number-based information and math. People who have dyscalculia often face mental health issues when they have to do math, such as anxiety, depression, anger and fear. Symptoms of this condition usually appear in childhood, but adults may have dyscalculia without knowing it.