Why she is unable to sleep is first thing to find out. Whether she has any stress or anxiety? Check her thyroid profile. Avoid cofee/tea after 6pm. Can try mild sedative but only under doctor guidence.

hello anti anxiety agents with sedatives under physicians care destress techniques will help bye

Hello... Black mark could be due to lack of sleep, You have altered sleep cycle ,you should get up and go to bed at regular timing each day.. Don't have too much of coffee or tea , avoid watching TV, playing games at bed , relax do breathing exercise ,listen to some music , do exercise in morning,don't take sleeping pills without consulting doctor