Can masturbation cause bruising to your insides if you didn't go in the vagina? after orgasm my whole body feels sore. i went to the dr and they said it was inflammation. i went again and they said it was muscle strain. it's been a long time?

It is not feasible to provide a meaningful opinion without taking additional history, physical examination and may be some tests. It would be prudent to see your doctor and discuss if you may be depressed. Counter-intuitive as it may seem, exercise may help. Start with low intensity exercise such as walking and gradually increase the intensity as tolerated. Drink more water. Wish you good health!

It depends on what you use. avoid rough large objects and use plenty of lubrication . You can also switch to clitoral stimulation. For a few days, if you still feel sore try a warm bath after it. I think you will be O.K.