When can't you dye your hair? It’s healthier to avoid these times
Hair dyeing is a way for many people to change their appearance and improve their self-confidence, but not all times are suitable for hair dyeing. If you choose the wrong time, you may cause damage to your hair or body. The following are the hair dyeing taboo times and related data that have been hotly discussed on the Internet in the past 10 days to help you dye your hair scientifically.
1. During the menstrual period

Women’s immunity is low during menstruation, and chemical components in hair dyes may enter the bloodstream through the scalp, increasing the risk of allergies or infections. The following are the statistics of adverse reactions to hair dyeing during menstrual period reported by netizens:
| Type of adverse reaction | Proportion (sample size 1,000 people) |
|---|---|
| Itchy scalp | 32% |
| Hair is noticeably damaged | 25% |
| Allergic redness and swelling | 18% |
2. Pregnancy and lactation period
Pregnant women and nursing mothers should avoid hair dyeing. Ammonia, hydrogen peroxide and other ingredients in hair dye may affect fetal development or be passed on through breast milk. A survey on a maternal and infant platform shows:
| crowd | Choose hair dye ratio | The proportion of uncomfortable symptoms |
|---|---|---|
| Early pregnancy (1-3 months) | 5% | 41% |
| Lactation | 8% | 29% |
3. When the scalp is damaged
If your scalp has wounds, eczema, or severe flaking, hair dyeing can aggravate the irritation. Data from the dermatology department of a certain hospital show that among the cases of scalp problems aggravated by hair dyeing:
| Question type | Deterioration ratio | Extended recovery period |
|---|---|---|
| seborrheic dermatitis | 67% | 2-3 weeks |
| Unhealed trauma | 89% | More than 1 month |
4. Postoperative recovery period
If you are weak after surgery, dyeing your hair may cause infection or interfere with the effectiveness of the medicine. Plastic surgeons recommend the following surgeries with caution:
| Surgery type | Recommended time to avoid dyeing after surgery |
|---|---|
| head surgery | 3 months |
| heart stent | 6 months |
| cancer chemotherapy | 1 year |
5. Under extreme weather conditions
Hair dyeing in hot or cold weather can affect the results and scalp health:
| weather | Main risks |
|---|---|
| Temperature>35℃ | Pigment is lost quickly, and scalp sweating causes allergies. |
| Temperature<0℃ | The hair cuticles are difficult to close and the hair is dry |
Healthy hair dye tips:
1. Do a skin test 48 hours before dyeing
2. Choose plant-based hair dye or semi-permanent dye
3. The interval between hair dyeing should be at least 3 months.
4. Use color-protecting shampoo after dyeing
By scientifically avoiding these hair dyeing taboo periods, you can not only obtain your ideal hair color, but also protect your hair and body health to the greatest extent. If you are not sure whether your condition is suitable for hair dyeing, it is recommended to consult a professional doctor first.
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