Answer:
Pneumonia - Respiratory system
Pneumonia is the inflammation of air sacs (alveoli) in one or both lungs. It's usually caused by viruses or bacteria. Typical symptoms include a productive cough, shortness of breath, chest pain and fever.
Endometriosis - Reproductive system (female)
Endometriosis is a condition in which the endometrium (uterine lining) grows outside the uterus, usually on the ovaries, fallopian tubes and the tissue lining the pelvis. The most common symptoms are pelvic pain and infertility.
Fibromyalgia - Muscular system
Fibromyalgia is an incurable condition characterized by pain all over the body. The pain is usually accompanied by fatigue, sleep, memory, and mood issues. The exact cause is unknown and the treatment includes the control of the symptoms.
Dermatitis - Integumentary system
Dermatitis refers to irritation of the skin - many different skin conditions, e.g. eczema. It usually involves itchiness, dry red skin, and a rash.