was exposed to uv rays for 4 hours july. pimples started on shoulders, arms and chest. by september, i had severe itching, large mass of crusty, watering dark red rash on arms, tops of hands and nape of neck. no treatment by dermatologist has helped. as a child i was diagnosed with ultra sensitive skin and sensitivity to uv rays. as a teen, i got water bumps (no redness or burn ) on exposed areas. skin cancer is hereditary in father s family. my hands and arms are swollen, when scabs are opened water runs out. itching is killing me. blood pressure (usually 90 over 60 was 154 over 60 yesterday at urgent care.