Common Cold

Pathophysiology

Viral diversity: Rhinoviruses (40–50% of cases), coronaviruses (~15%), adenoviruses, respiratory syncytial virus (RSV), parainfluenza, and enterovirus. This viral diversity is why immunity to the common cold is never permanent — there are too many serotypes.
Infection mechanism: Viruses enter through the nasal mucosa (primary route) or conjunctivae, infecting the epithelial cells of the adenoids and nasopharynx. Viral replication causes cell lysis and triggers a local inflammatory response — bradykinin, prostaglandins, and histamine increase vascular permeability, producing nasal congestion, rhinorrhea, and sore throat.
Immune-mediated symptoms: The inflammation, sneezing, mucus production, and mild fever are the immune system's response to the infection, not the virus itself. This is why "cold medications" that suppress symptoms (antihistamines, decongestants, antipyretics) may actually prolong the illness by interfering with immune defenses.
Complications: Secondary bacterial sinusitis, otitis media (ear infection), laryngitis, and acute bronchitis can develop if the viral infection damages the mucociliary escalator and allows bacterial colonization.
Transmission: Primarily through direct or indirect contact with contaminated surfaces (fomites) — viruses survive on doorknobs, phones, and hands for hours. Also transmitted through airborne droplets from sneezing or coughing. Rhinovirus can remain viable in the air for up to 3 hours.

Rhinorrhea (runny nose) — initially clear and watery, may become thicker and yellowish as the immune response progresses
Sneezing, nasal congestion, and postnasal drip
Sore throat and hoarseness (from pharyngeal inflammation and postnasal drip)
Mild fever (usually < 102°F/38.9°C) or afebrile. Gradual onset over 12–48 hours
Mild malaise, headache, and slight myalgias
Symptoms typically last 7–10 days. Cough may linger up to 3 weeks
Key differentiator from influenza: Gradual onset with predominantly nasal symptoms versus influenza's abrupt onset with severe systemic symptoms (high fever, profound myalgias, debilitating fatigue)

High persistent fever (> 102°F/38.9°C) — suggests influenza or secondary bacterial infection rather than a simple cold. Medical referral
Colored sputum (green/yellow) with worsening symptoms after initial improvement — suggests secondary bacterial infection (sinusitis, bronchitis). Medical referral
Severe headache with facial pain and purulent nasal discharge — suggests bacterial sinusitis. Medical referral
Symptoms lasting more than 2 weeks without improvement — consider alternative diagnoses (allergic rhinitis, sinusitis). Medical referral

Acute febrile phase: Contraindicated. Circulatory massage during active infection increases metabolic demand on an immune system already engaged in fighting the virus. Any fever (even low-grade) is a contraindication.
Contagion period: The cold is most contagious during the first 2–3 days of symptoms. Reschedule if the client is in this window to protect the therapist and subsequent clients.
Late recovery phase (days 5–10+, no fever, mild residual congestion): Massage may be performed with modifications. The client is generally no longer contagious and the immune response is winding down.
Positioning: Semi-supine or seated preferred during congested phases. Prone position and flat supine are uncomfortable with nasal congestion and postnasal drip.
Therapist self-protection: Strict hand hygiene (30-second scrub before and after). Avoid touching your face during the session. Ventilate the room. If the therapist is feeling ill, reschedule — spreading infection to clients is unprofessional and harmful.
Do not claim that massage "boosts immunity" or "cures colds." Anecdotally, massage during late recovery may temporarily worsen symptoms before resolution, but this is not evidence for a therapeutic mechanism.

Category A7 — Systemic Conditions (Respiratory)
Distinguish the common cold (gradual onset, nasal symptoms, mild fever) from influenza (abrupt onset, high fever, severe systemic symptoms) — a commonly tested differential
Know that antibiotics are ineffective against viral infections — prescribing antibiotics for a cold is inappropriate and contributes to antibiotic resistance
The clinical judgment to reschedule during the acute phase versus treat during recovery demonstrates understanding of contraindication reasoning
Fomite transmission and hand hygiene are testable infection control concepts

The common cold is a self-limiting viral URI lasting 7–10 days. Most symptoms are caused by the immune response rather than the virus itself
Massage is contraindicated during the acute febrile phase. Reschedule if the client is in the first 2–3 days of symptoms (most contagious period)
Late recovery massage (no fever, mild residual congestion) is appropriate with positioning modifications
Distinguish from influenza by gradual onset and predominantly nasal symptoms versus influenza's abrupt onset and severe systemic illness
High persistent fever, colored sputum with worsening symptoms, or symptoms lasting more than 2 weeks require medical referral
Strict hand hygiene and room ventilation are essential infection control measures
Antibiotics are ineffective against viral colds and should not be expected or requested