Red spots on the skin, also known as skin rashes or erythema, can significantly affect a person’s life. These discoloured patches or bumps can appear anywhere on the body (vary in shape, size and intensity). Sometimes, red spots on your skin are nothing to worry about. Other times they can be a sign that something more serious is going on. Let us look at some reasons why these spots show up, how you can figure out what’s causing them, what you can do about it and when it’s time to reach out for medical advice.
Common Causes of Red Spots on Skin
Red patches on the skin can arise from various factors. They are:
A. Skin Conditions:
- Eczema: A chronic inflammatory skin disease characterised by dry, itchy and tiny red spots on the skin.
- Psoriasis: An autoimmune condition leading to raised, red, and scaly patches on the skin.
- Contact Dermatitis: An allergic or irritant reaction to certain substances, resulting in red, itchy rashes.
- Pityriasis Rosea: Rosea is an inflammatory skin condition in which a larger patch appears first, usually on the chest, back, or abdomen.
B. Infections:
- Bacterial Infections: Conditions like impetigo or folliculitis can cause red, pus filled bumps on the skin.
- Viral Infections: Infections like chickenpox or measles can lead to red spots or rashes.
- Fungal Infections: Diseases like ringworm or candidiasis can cause itchy, scaly, small red spots on the skin.
C. Insect Bites or Stings:
- Mosquito bites, flea bites, or bee stings can cause localised red, swollen bumps on the skin.
D. Allergic Reactions:
- Exposure to certain foods, medicines, or environmental allergens can cause red, itchy hives or rashes.
E. Heat Rash:
- Excess sweat during exercise or in hot or humid weather can clog the pores, resulting in small bumps and red spots in the skin, particularly in areas where the skin rubs together, like the armpit.
F. Vascular Conditions:
- Cherry angiomas: Small, bright red bumps caused by dilated blood vessels.
- Petechiae: Tiny, flat red spots on the skin resulting from bleeding under the skin.
Symptoms of Red spots
Symptoms can vary from person to person and depend on the nature and severity of the condition. You can have some common signs and symptoms of red spots. They are:
- Size can range from small pinpoints (petechiae) to larger patches or raised bumps (papules) on the skin
- Itching, ranging from mild to severe and sometimes may be associated with a scaly, flaky texture or swelling
- Pain or tenderness, particularly in pus-filled blisters
- Swelling around red spots, particularly after an infection or an insect bite
- Discharge of liquid or blood
- Associated systemic symptoms such as fever, fatigue, joint pain, or other signs of infection or inflammation.
Diagnosis
To determine the underlying reason for red spots on the skin, a doctor may perform the various diagnostic procedures. They are:
- Physical Examination: How they look, their spread & associated symptoms.
- Medical History: Doctors will gather information about recent exposures, medications, or underlying medical conditions.
- Blood Tests: Doctors may order blood evaluations to check for potential infections, allergies, or autoimmune disorders.
- Allergy Testing: To check allergic reactions, doctors may recommend allergy testing to identify specific allergens.
- Skin Biopsy: In some cases, doctors may extract a small sample from the affected part of the skin for microscopic examination to rule out more serious conditions.