Hi and welcome to Healthcaremagic. Thank you for your query. I am Dr. Rommstein and I will try to help you as much as I can. Spots on head are probably atheromas and these are small subcutaneous glands which may become clogged and grow. This should be surgically removed under local anasthesia. This is not serious. Her blood in stool is something else,however,cancer is the last thing to think of in her age. It is in most cases caused by hemorrhoids or anal fissure so she should see proctologist for further evaluation. I hope I have answered you query. If you have any further questions you can contact us. Kindly regards. Wish you a good health.