Hair dyes can trigger minor to severe allergic reactions in a small percentage of users. They can also cause dry, brittle hair and hair breakage with extended and frequent use. According to the American Cancer Society, the evidence linking personal hair dye use and cancer is limited and conflicting. As of 2014, personal use of semi-permanent and permanent hair dyes is not considered a known risk factor for cancer.Know More
Professional hairstylists may have cause for concern, however. According to the American Cancer Society, numerous studies have suggested that workplace exposure to hair-dye chemicals can lead to a slightly elevated risk of bladder cancer. These findings have led the International Agency for Research on Cancer to identify occupational exposure to hair dyes as a probable risk factor for cancer.
Another potentially serious but rare side effect is an allergic reaction to the chemical paraphenylenediamine, a common ingredient in commercial hair dyes. This allergy affects about one in 250,000 people, and those with a history of allergies should be especially cautious of using a chemical dye. An allergic reaction to hair dyes may present itself as an itchy, red rash around the face and neck, and less commonly a rash on the scalp and extreme swelling of the face. The allergy can become more severe over time, resulting in blisters, hives and difficulty breathing, and continued use can be fatal.Learn more about Hair Color
After using L'Oreal Feria dyes, hair can be colored by another permanent dye. If changing hair color entirely, wait four weeks between colorings to prevent hair damage. Root touch-ups between colorings are a good way to maintain color without causing damage.Full Answer >
As with most medications, trimethroprim can cause several bothersome but relatively harmless side effects, including vomiting, diarrhea, upset stomach, decreased appetite, headache and changes in taste sensation; it can also cause serious side effects such as allergic reactions and gastrointestinal complications, according to WebMD. Trimethroprim is a medication taken orally to combat certain types of bacterial infections. This medicine works by inhibiting the growth of new bacterial cells and kills off existing bacteria.Full Answer >
Biofreeze does not have any common side effects, but serious side effects can include severe irritation and allergic reactions, according to Drugs.com. Allergy symptoms can include itching, difficulty breathing, rash, hives, chest tightness, and swelling in the face, mouth, tongue and lips.Full Answer >
Severe side effects of Traumeel ointment include allergic reactions such as rash, hives, itching, tightness in the chest, difficulty breathing and swelling in the mouth, face, lips or tongue, according to Drugs.com. Side effects of Traumeel liquid injection include redness, pain or swelling at the puncture site.Full Answer >