Would massaging with a gua sha help?

Lately, I've been self-conscious about my facial contours, so I'm thinking of trying a gua sha massage. Would gua sha massage be effective for defining my lines? Since it relaxes the muscles, theoretically it seems like it should help, but I'm worried that if I massage it incorrectly, my face might swell up more or I might develop dermatitis. If anyone uses a gua sha, could you please let me know if it's safe to use and recommend a product?