Recording an ECG is a safe and painless procedure. The procedure is a painless and noninvasive method of stimulating the cortex. Benign lesions tend to be painless, asymptomatic and slow-growing. The slaughtering process is intended to be quick and relatively painless to the animal. Allodynia is pain experienced in response to a normally painless stimulus. It is also virtually painless for the patient. Diverticular disease can present with painless rectal bleeding as bright red blood per rectum. Dermoid cyst symptoms are minor and the cysts are usually painless. It is usually painless and persistent. Women with placenta previa often present with painless, bright red vaginal bleeding. Besides being painless, the test is fast. Many patients will not experience any symptoms, except for a painless mass. Symptoms of soft tissue sarcomas vary, but often present as firm, painless lumps or nodules. The primary skin lesion usually starts with a macule that is painless, round and erythematous. MRI is safe, painless, and informative and has greatly improved the diagnosis of syringomyelia.