12th house belongs to Jupiter. It signifies bedroom. Rahu here gives mental troubles, insomnia. It also leads to excessive expenditure on sisters and daughters. If Rahu is with its enemies then it becomes next to impossible to make ends meet, despite hard labour. It also leads to false allegations. One may even go to the extreme of contemplating suicide. One has mental worries. Telling lies, deceiving others etc. may make Rahu even more malefic. If some body sneezes at the start of any new work if gives malefic effect. There may be theft, diseases or false allegations. If Mars is with Rahu here, then it gives good results.
Lal Kitab Remedies for Rahu:
Take your meals in the kitchen itself.
Keep Saunf and Khand under the pillow for good night's sleep.