The Seven-year itch or seven-month itch
Itch meaning ‘ansia’, ‘gusanillo’ in Spanish.
When they talk about the seven-year itch, they are talking about the loss of passion and the start of monotony that supposedly happens in a couple who has been together for 7 years.
We can apply this to the seven months too.
But also, the seven-month itch refers to the strange need for regular change of barber. Yes, for getting a haircut.
So, figuratively, the seven-month/year itch means the need for a deep change of life or situation.