Types of synesthesia

According to Psychology Today, over 60 types of synesthesia have been reported. The most common type is grapheme-colour synesthesia - when letters or numbers seem to be coloured on a page or visualised as coloured.

Other types include:

• Smelling certain scents when hearing certain sounds.
• Seeing music as colours.
• Tasting words.
• Feeling certain textures cause certain emotions.
• Feeling that time has a physical characteristic.
• Seeing a particular colour when feeling pain.