A brown/black dot under the nail can indicate skin cancer. Pale or white nails can be a sign of liver cancer. “Clubbing”, which is the enlargement of the fingers with nails that curve down over the tips, can be a sign of lung cancer.
Pain

Pain is a common symptom experienced by individuals with cancer, and it can vary in intensity and nature depending on the type and location of the disease. This pain may result from the tumor pressing on nerves, bones, or organs, or it can be a side effect of treatments such as chemotherapy or radiation. Recognizing and managing cancer-related pain is essential for improving quality of life and overall well-being. Understanding the different pain symptoms associated with cancer can help guide appropriate pain management and medical care.
16. Unusually heavy or painful periods, bleeding between periods

A common sign of endometrial or uterine cancer. A transvaginal ultrasound should be considered if the problem persists.
17. A chronic cough or chest pain

Leukemia and lung tumors (among others), show symptoms that can mimic a bad cough or bronchitis. Some patients also reported chest pain that extended to the shoulder and down their arms.