Why is my skin on my thigh so sensitive and the muscle painful alongside my severe hip pain? My gp has booked MRI but not got a date yet

Nerve irritation. The hypersesitivity you are reffering to usually indicates some irritation to one of the nerve of the thigt.The most common one is called meralgia paresthetica due to irritation or damage to the lateral femoral cutaneous nerve, however other ethiologies producing similar type of pain need to be investigated such as disc pathology, hip pathology etc.