First of all, don't worry : dry hair is a very common blemish, and it affects everyone, to a greater or lesser extent, at least once in their lives.
Extreme dryness of the hair is caused by a lack of sebum in the hair tissue itself , a lack which, in turn, can be caused by various factors :
- genetics
- poor nutrition or nutrient absorption disorders
- hormonal factors
- environmental and climatic factors (prolonged and careless exposure to the sun, UV rays or, conversely, to very cold temperatures, air conditioning, etc.)
- incorrect cosmetic habits (overly aggressive shampoos, frequent bleaching and dyeing, excessive use of hair dryers and straighteners)
Unfortunately, there's little you can do about genetics , while for issues related to diet or hormonal balance, it's always best to consult a specialist. For this reason, here we'll focus on the last two causes of straw-like hair: environmental/climatic factors and inappropriate cosmetic habits.