Chickenpox is a highly contagious infection which causes a red spotty itchy rash. Early symptoms include muscle aches, high temperature (fever) and loss of appetite. Symptoms usually last 1-2 weeks and are more severe in adults than in children. To relieve symptoms, it is advised to use cooling lotions and gels such as Virasoothe and to take paracetamol to help with pain and discomfort.