Objective: Mapping emotional dynamics with DTW analysis in 6 mycosis fungoides or Sezary syndrome patients and 6 chronic cluster headache patients treated with systemic corticosteroids. Study design: Case series report study. Study population: Six patients with cutaneous T-cell lymphoma (type mycosis fungoides and/or Sezary syndrome), and six patients with cluster headache. Main study parameters/endpoints: An idiographic DTW analysis of emotional dynamics during and after corticosteroid treatment in six mycosis fungoides and/or Sezary syndrome patients, and six chronic cluster headache patients. Nature and extent of the burden and risks associated with participation, benefit and group relatedness: There are no additional risks associated with study participation. The patients who will participate in this case series study need to complete a 5-minute survey daily using a m-Path smartphone app during corticosteroid treatment. The data analysis may increase the insight into centrality measures of emotions and the emotional clusters for the individual patient.