Why does my right thigh go numb minutes after i lay down. and also when i'm standing or walking? it's numb from the kneecap up to the hip. i

Meralgia Paresthetic: Meralgia paresthetica is a benign condition in which the anterior thigh will experience numbness, burning, tingling sensations from stretching of a nerve just below the surface of the skin or from compression of the nerve. It is usually relieved when the leg is flexed and turning on your side. It is a simple condition which is best left alone unless severe.

See below: It could be femoral neuropathy, radiculopathe affecting l3-4-5 . See your doctor.