Hello, You are suffering from bruise and pain in the lower abdomen and top of the upper thighs to the sides of the privates caused due to accident. You can apply ointment Thrombophob on the area of the bruise so that blood clots under the skin can get dispersed. Take Acetaminophen, one stat when needed to get relieve from inflammation, soreness and pain. You have pain in the stomach and diaphragm feels hard and distended. To get relief from stomach pain, you can take PPIs or Spasmoproxyvon, to get rid of spasms. You are advised to go to ER urgently, get clinically examined by a GP, get all required tests and investigations done to detect any internal trauma, bleeding, injury that needs immediate medical attention and treatment. Diaphragm is an important respiratory muscle. Distended diaphragm may be indicative of injury due to blunt trauma or abdominal viscera displacement. If diagnosis and treatment is delayed it may result in worsening of symptoms and complications. Get clinically examined and assessed, urgent treatment may be required. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Nupur K., General & Family Physician