Regression  work may assist

It could be Nyctophobia (fear of dark or night). This definitely needs attention. Discuss the fear. Listen carefully to your child, without playing into their fears, to see if you can identify a trigger. And once you found the reason you might know what to do. If she suddenly developed this fear then it's the right time to concentrate on this.

Hi Your daughter screams at night when no light is turned on and when the light is on she become normal. It is important to know how long has it been since you have noticed that your daughter screams when the light is on. To feel better your daughter can seek professional help from a psychologist. More information is required in order to know the reason for your daughter to feel uncomfortable in darkness. I understand you are worried about your daughter, try to be calm. Your daughter will require counselling sessions.

Hi

Slowly, start exposing her to the dark in your presence and give her some courage for time being. However, consulting a psychologist is must.

Consult with a psychotherapist in your area or online. It could be phobia or trauma, or something else. It will probably take many sessions to resolve it.

Hi, Consult a psychologist.Adequate history is required.Nightmare can be due to traumatic experience

Hi, you can discuss with your loved one for taking a psychotherapy session for resolving her problem, this can be easily sorted out under guidance of experienced psychotherapist.

Take her to a therapist /psychologist to get a clarity and understanding about her and tk over 8th is issue.

Hi.. More information needed from how long it's been going on, it's frequency, any recent changes she faced etc. I suggest you to consult a Psychologist.

Plz connect  with psychiatrist and psychologist  to resolve inner conflict.

Hi... This can be a general fear of darkness, many people don't feel comfortable in dark. And there is a possibility of some underlying condition. Please consult a Psychologist for better insights, advice, and treatment. One thing I find strange, the ages mentioned on your query. How can a 31 year old woman has a 20 year old daughter. I suppose there is some mistake.

Hi It could be a trauma or nightmare. If she experiencing this consistently, please consult with a Psychologist.

Hello, Please book a counseling session with a psychologist to discuss this in detail with your daughter.