Itchy armpits are often caused by non-cancerous conditions, such as poor hygiene or dermatitis. However, in some cases, the itch may be a sign of more serious conditions, like lymphoma or inflammatory breast cancer. Itchy armpits are often caused by non-cancerous conditions, such as poor hygiene or dermatitis. However, in some cases, the itch may be a sign of more serious conditions, like lymphoma or inflammatory breast cancer. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle