Can Excess Caffeine Cause Rashes?
Excess caffeine does not cause skin rashes, but if you’re allergic to caffeine rashes may develop when you ingest a small amount of the substance. Drugs.com states that skin rashes are a severe side effect when using caffeine, one that needs to be evaluated by your health care provider. Caffeine overdose can cause life-threatening symptoms, such as the inability to breathe, convulsions and a racing heart beat, but does not trigger skin rashes.
Caffeine is a natural substance found in cocoa beans, coffee beans and tea leaves. In Europe and North America, it is primarily ingested through coffee consumption. Moderate consumption is defined by two to four cups daily, which is about 200 to 300 milligrams of caffeine. Anything over 500 milligrams, or four or more cups of coffee daily, may increase your chances of developing side effects. Caffeine is also found in medications that provide between 100 and 200 milligrams of caffeine per dose, according to Drugs.com. It’s not recommended to consume more than 1,000 milligrams of caffeine in a 24-hour period.
- Caffeine is a natural substance found in cocoa beans, coffee beans and tea leaves.
- Moderate consumption is defined by two to four cups daily, which is about 200 to 300 milligrams of caffeine.
Caffeine Overdose Symptoms
Can Caffeine Cause Hives?
Caffeine overdoses are normally accidental, and often occur by ingesting more than one product that contains the substance. For example, if you drink four cups of coffee and you have been taking caffeine pills, you may ingest more caffeine than your body can handle. Caffeine overdose can lead to hospitalization and may require emergency medical attention to prevent further complications. Common symptoms include fever, dizziness, hallucinations, muscle twitching, sleeping trouble, diarrhea, irregular heartbeat, increased urination and thirst.
- Caffeine overdoses are normally accidental, and often occur by ingesting more than one product that contains the substance.
- Caffeine overdose can lead to hospitalization and may require emergency medical attention to prevent further complications.
Allergic Skin Rashes
Drugs.com states that a common rash that develops from a caffeine allergy is hives. Hives can develop quickly after consuming the substance, causing red welts to develop anywhere on your body. The welts are harmless, but hives is typically a sign of a severe allergic reaction. General skin itching felt in your mouth, face or lips is also a sign of an allergic reaction. If you’ve been diagnosed with eczema, an allergic reaction may cause a flare-up of this skin condition.
- Drugs.com states that a common rash that develops from a caffeine allergy is hives.
- The welts are harmless, but hives is typically a sign of a severe allergic reaction.
Does Caffeine Cause Stomach Pain?
Hives that develop with facial, throat, tongue or lip swelling may be a sign of anaphylaxis. Anaphylaxis can lead to life-threatening symptoms, such as shortness of breathe, a sudden drop in blood pressure, shock and a faint but rapid pulse. Call 911 if you develop these symptoms after ingesting caffeine.
Can Caffeine Cause Hives?
Does Caffeine Cause Stomach Pain?
Does Cocoa Butter Contain Caffeine?
Congestive Heart Failure & Caffeine
Allergic Reactions to Caffeine
Coffee Allergy & Rash
Caffeine & Back Pain
Can Drinking Coffee Cause Dry Mouth?
Weight Loss With Caffeine & Aspirin
Caffeine Sensitivity & Itching Skin
- MedlinePlus: Caffeine Overdose
- Drugs.com: Caffeine Side Effects
- Drugs.com: Caffeine (Oral)
- American Academy of Allergy, Asthma and Immunology: Allergic Skin Conditions
- American College of Asthma, Allergy and Immunology: Drug Allergy
- Meredith SE, Juliano LM, Hughes JR, Griffiths RR. Caffeine Use Disorder: A Comprehensive Review and Research Agenda. J Caffeine Res. 2013;3(3):114-130. doi:10.1089/jcr.2013.0016
- Richards G, Smith AP. A Review of Energy Drinks and Mental Health, with a Focus on Stress, Anxiety, and Depression. J Caffeine Res. 2016;6(2):49-63. doi:10.1089/jcr.2015.0033
- Brunyé TT, Mahoney CR, Rapp DN, Ditman T, Taylor HA. Caffeine enhances real-world language processing: evidence from a proofreading task. J Exp Psychol Appl. 2012;18(1):95-108. doi:10.1037/a0025851
- Koppelstaetter F, Poeppel TD, Siedentopf CM, et al. Caffeine and cognition in functional magnetic resonance imaging. J Alzheimers Dis. 2010;20 Suppl 1:S71-84. doi:10.3233/JAD-2010-1417
- Harrell PT, Juliano LM. Caffeine expectancies influence the subjective and behavioral effects of caffeine. Psychopharmacology (Berl). 2009;207(2):335-42. doi:10.1007/s00213-009-1658-5
- Lucas M, O'reilly EJ, Pan A, et al. Coffee, caffeine, and risk of completed suicide: results from three prospective cohorts of American adults. World J Biol Psychiatry. 2014;15(5):377-86. doi:10.3109/15622975.2013.795243
- Abdel-Hady H, Nasef N, Shabaan AE, Nour I. Caffeine therapy in preterm infants. World J Clin Pediatr. 2015;4(4):81-93. doi:10.5409/wjcp.v4.i4.81
- American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders. 5th edition. Washington DC; 2013.
- Turnbull D, Rodricks JV, Mariano GF, Chowdhury F. Caffeine and cardiovascular health. Regul Toxicol Pharmacol. 2017;89:165-185. doi:10.1016/j.yrtph.2017.07.025
- Centers for Disease Control and Prevention. Alcohol and Caffeine. Updated October 23, 2018.
- Alsunni AA. Energy Drink Consumption: Beneficial and Adverse Health Effects. Int J Health Sci (Qassim). 2015;9(4):468-474.
- Lyngsø J, Ramlau-Hansen CH, Bay B, Ingerslev HJ, Hulman A, Kesmodel US. Association between coffee or caffeine consumption and fecundity and fertility: a systematic review and dose-response meta-analysis. Clin Epidemiol. 2017;9:699-719. doi:10.2147/CLEP.S146496
- U.S. Food and Drug Administration. Pure and Highly Concentrated Caffeine. Updated September 21, 2018.
- National Institute on Drug Abuse. Drugs, Brains, and Behavior: The Science of Addiction. Updated July 2018.
Diane Marks started her writing career in 2010 and has been in health care administration for more than 30 years. She holds a registered nurse license from Citizens General Hospital School of Nursing, a Bachelor of Arts in health care education from California University of Pennsylvania and a Master of Science in health administration from the University of Pittsburgh.