Bumps that appear in summer: what is happening?

By Dre Aurélia Nha-Huyen Nguyen Gouez, family physician and medical director of French origin, based in Quebec since 2016.

Summer is synonymous with heat, the outdoors, and activities in the sun. But it is also the season when many patients, both children and adults, seek a medical consultation for bumps that have suddenly appeared on the skin. Between heat, insects, allergens, and infections, the causes are manifold. Should you be worried? How can you relieve the itching? And when should you consult a doctor?

Here is an overview of the main causes and the best practices to adopt.

1. Heat rash (miliaria)

These small red or translucent bumps, often grouped together, appear when sweat glands become blocked due to excessive perspiration. They are common in skin folds (back, chest, armpits, neck), especially in active people, those overheating, or those exposed to a humid environment.

2. Insect bites

Mosquitoes, black flies, ants, wasps, or spiders leave red marks, sometimes swollen, that itch intensely. Some people exhibit exaggerated reactions, with edema or severe redness.

3. Hives (heat, sun, allergies)

Hives manifest as raised, red, itchy patches that migrate across the body. They can be caused by heat, sun exposure (solar urticaria), a food, a medication, or a chemical product. They often disappear within a few hours but may recur.

4. Contact allergic reactions

Certain plants (grass, poison ivy), sunscreens, mosquito repellents, or pool products can cause localized skin rashes that are red, irritated, and sometimes oozing.

5. Folliculitis

These are small red or white bumps around the hairs, often on the legs, torso, or back. It is encouraged by perspiration, shaving, or swimming in contaminated water (such as certain spas or pools). It can be infectious or simply irritative.

6. Skin infections

Impetigo, shingles, chickenpox (in non-immunized individuals), or summer viral rashes can also cause bumps, sometimes accompanied by fever or general malaise. These cases require a medical evaluation.

When should you consult?

You should consult a doctor if:

• The bumps spread rapidly or change in appearance

• They are painful, oozing, or contain pus

• You have a fever, chills, or general malaise

• The itching is intense, preventing you from sleeping or functioning normally

• You do not know the cause and the situation does not improve after a few days

• You have a history of severe allergies (generalized hives, edema, anaphylaxis)

Why consult a home doctor in Montreal?

If you have an uncomfortable skin rash, waiting for hours in a waiting room is not ideal.

A home doctor in Montreal can:

• Evaluate the cause of the bumps directly at your home

• Prescribe an appropriate treatment: antihistamines, anti-inflammatory cream, local or oral antibiotics

• Advise you on prevention (clothing, products, allergens to avoid)

• Prevent you from contaminating others or being contaminated in a clinical setting

At Allodocteur.ca, we regularly treat adults and children presenting with unexplained bumps or summer skin reactions.

Conclusion

Bumps that appear in summer are common, but they should not be taken lightly. While sometimes benign, they can also reveal an infection or an allergic reaction requiring treatment. If you have any doubt, do not wait for the situation to worsen. A home doctor in Montreal can evaluate you quickly and offer an effective treatment without you having to leave your home.

Book an appointment now with a home doctor in Montreal at www.allodocteur.ca or call us: we are open even on weekends.