Hello and welcome to HCM, A painless, soft growth present on the thigh can be due to soft tissue growth, muscle growth, adipose tissue growth, etc. A fine needle aspiration (FNA) is the first line of investigation. This test is a simple office procedure which samples the cells from the swelling. These cells are examined under the microscope. The origin and the character of the lesion are determined by this test. On the basis of the results, further management will be planned. The shooting pain that you are experiencing in the groin region can be due to the lesion in the groin or it can be an isolated lesion not related to the first lesion. Shooting pain is commonly associated with sciatica. You will need to consult your doctor for clinical examination for both thigh swelling and the groin pain. Thanks and take care Dr Shailja P Wahal