| Organ system | Symptoms |
|---|---|
| Respiratory | Tachypnea |
| Sense of suffocating | |
| Dyspnea | |
| Asthma | |
| Bronchospasm | |
| Cough | |
| Otorhinolaryngological | Hyperosmia |
| Burning eyes—stinging sensation | |
| Laryngeal burning sensation | |
| Neurological | Cephalgia |
| Migraine | |
| Asthenia | |
| Trembling | |
| Attention deficit | |
| Dizziness | |
| Confusion | |
| Loss of concentration capacity | |
| Sensorial: abnormal perception of odors | |
| Sensorial: visual disturbances | |
| Sensorial: hyperacusis | |
| Insomnia | |
| Dermatological | Pruritus |
| Eczema | |
| Rash | |
| Urticaria/angioedema | |
| Skin photosensitivity | |
| Dermographism | |
| Rheumatological | Arthralgia |
| Myalgia | |
| Cardiovascular | Palpitations |
| Arrhythmia | |
| Tachycardia | |
| Gastroenterological | Nausea |
| Abdominal pain | |
| Irritable colon | |
| Endocrinological | Dysthyroidism |
| Adrenal gland disorders | |
| Pituitary disorders | |
| Psychological/psychiatric | Anxiety |
| Panic attacks | |
| Depression | |
| Bipolar disorder |
The bold symptoms represent the most frequent symptoms in MCS